diff --git a/package-lock.json b/package-lock.json
index f366cee..c666d6a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,7 +21,8 @@
       "version": "2.7.0",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-2.7.0.tgz",
       "integrity": "sha1-q259nYhqrKiwhbwzEreaGYQz8Oc=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "acorn-globals": {
       "version": "1.0.9",
@@ -757,7 +758,8 @@
       "version": "0.3.2",
       "resolved": "https://registry.npmjs.org/cssom/-/cssom-0.3.2.tgz",
       "integrity": "sha1-uANhcMefB6kP8vFuIihAJ6JDhIs=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "cssstyle": {
       "version": "0.2.37",
@@ -1765,6 +1767,15 @@
             "mime-types": "2.1.17"
           }
         },
+        "gitbook-plugin-highlight": {
+          "version": "2.0.2",
+          "resolved": "https://registry.npmjs.org/gitbook-plugin-highlight/-/gitbook-plugin-highlight-2.0.2.tgz",
+          "integrity": "sha512-fNLhQqtFttJh7Iv2lOj+w3UvwbU1hag1gWy/FhfU/di2N5Xlh9srsIUjoh8qLg6eqKU3XNh4DjnmrE6BbNgRwQ==",
+          "dev": true,
+          "requires": {
+            "highlight.js": "9.2.0"
+          }
+        },
         "graceful-fs": {
           "version": "4.1.4",
           "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.4.tgz",
@@ -1795,6 +1806,12 @@
             "sntp": "1.0.9"
           }
         },
+        "highlight.js": {
+          "version": "9.2.0",
+          "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.2.0.tgz",
+          "integrity": "sha512-4q42pgGgAjEfzhsclW83Ow3Qu36eea7UwpNW1YjDJJBhEFMtcFvydKqaUCKivkSUjk16BWg1/Pwy+kSyyaE86A==",
+          "dev": true
+        },
         "hoek": {
           "version": "2.16.3",
           "resolved": "https://registry.npmjs.org/hoek/-/hoek-2.16.3.tgz",
@@ -1951,6 +1968,24 @@
           "integrity": "sha512-b0553uYA5YAEGgyYIGYROzKQ7X5RAqedkfjiZxwi0kL1g3bOaBNNZfYkzt/CL0umgD5wc9Jec2FbB98CjkMRvQ==",
           "dev": true
         },
+        "extsprintf": {
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/extsprintf/-/extsprintf-1.0.2.tgz",
+          "integrity": "sha512-g21Br4ELmVaKCVSUSSTXecKG+MiLcHFoby5RPPUmfZdhQTontXUOPf0QK/TvreRjgItRiyO928zxR4TCrnuwmA==",
+          "dev": true
+        },
+        "jsprim": {
+          "version": "1.4.0",
+          "resolved": "https://registry.npmjs.org/jsprim/-/jsprim-1.4.0.tgz",
+          "integrity": "sha512-OyKQuabgqUi2RUPauBrfZNoCb0KNoulf1DqQ07rUW2vzauzXAq/uUe7oDstV/2RavaxGn7NfcI/F2hrBk38Fbg==",
+          "dev": true,
+          "requires": {
+            "assert-plus": "1.0.0",
+            "extsprintf": "1.0.2",
+            "json-schema": "0.2.3",
+            "verror": "1.3.6"
+          }
+        },
         "npm": {
           "version": "5.1.0",
           "resolved": "https://registry.npmjs.org/npm/-/npm-5.1.0.tgz",
@@ -3885,42 +3920,6 @@
                       "bundled": true,
                       "dev": true
                     },
-                    "jsprim": {
-                      "version": "1.4.0",
-                      "bundled": true,
-                      "dev": true,
-                      "requires": {
-                        "assert-plus": "1.0.0",
-                        "extsprintf": "1.0.2",
-                        "json-schema": "0.2.3",
-                        "verror": "1.3.6"
-                      },
-                      "dependencies": {
-                        "assert-plus": {
-                          "version": "1.0.0",
-                          "bundled": true,
-                          "dev": true
-                        },
-                        "extsprintf": {
-                          "version": "1.0.2",
-                          "bundled": true,
-                          "dev": true
-                        },
-                        "json-schema": {
-                          "version": "0.2.3",
-                          "bundled": true,
-                          "dev": true
-                        },
-                        "verror": {
-                          "version": "1.3.6",
-                          "bundled": true,
-                          "dev": true,
-                          "requires": {
-                            "extsprintf": "1.0.2"
-                          }
-                        }
-                      }
-                    },
                     "sshpk": {
                       "version": "1.13.1",
                       "bundled": true,
@@ -4910,6 +4909,23 @@
             "semver": "4.3.6"
           },
           "dependencies": {
+            "json-schema": {
+              "version": "0.2.2",
+              "resolved": "https://registry.npmjs.org/json-schema/-/json-schema-0.2.2.tgz",
+              "integrity": "sha512-DFzwwaFNKI+cfMyHtcyGA6N9d8jOWEtLc9IrT7WbpZc1V8M5S/HMBjJ3aM2Fx40bcTL2xTuIX/bBr8Zj2soGyg==",
+              "dev": true
+            },
+            "jsprim": {
+              "version": "1.3.0",
+              "resolved": "https://registry.npmjs.org/jsprim/-/jsprim-1.3.0.tgz",
+              "integrity": "sha512-VEQ5HZwLwk6NS2QC0ZewTgrDxd7RuglkGnc7mhlJJ8aK90K1FBxtGsujXkNVkIspeWcAKZhozIQAWwu8CxW3fg==",
+              "dev": true,
+              "requires": {
+                "extsprintf": "1.0.2",
+                "json-schema": "0.2.2",
+                "verror": "1.3.6"
+              }
+            },
             "npm": {
               "version": "2.15.12",
               "resolved": "https://registry.npmjs.org/npm/-/npm-2.15.12.tgz",
@@ -6154,36 +6170,6 @@
                           "bundled": true,
                           "dev": true
                         },
-                        "jsprim": {
-                          "version": "1.3.0",
-                          "bundled": true,
-                          "dev": true,
-                          "requires": {
-                            "extsprintf": "1.0.2",
-                            "json-schema": "0.2.2",
-                            "verror": "1.3.6"
-                          },
-                          "dependencies": {
-                            "extsprintf": {
-                              "version": "1.0.2",
-                              "bundled": true,
-                              "dev": true
-                            },
-                            "json-schema": {
-                              "version": "0.2.2",
-                              "bundled": true,
-                              "dev": true
-                            },
-                            "verror": {
-                              "version": "1.3.6",
-                              "bundled": true,
-                              "dev": true,
-                              "requires": {
-                                "extsprintf": "1.0.2"
-                              }
-                            }
-                          }
-                        },
                         "sshpk": {
                           "version": "1.9.2",
                           "bundled": true,
@@ -6548,6 +6534,15 @@
           "requires": {
             "os-tmpdir": "1.0.2"
           }
+        },
+        "verror": {
+          "version": "1.3.6",
+          "resolved": "https://registry.npmjs.org/verror/-/verror-1.3.6.tgz",
+          "integrity": "sha512-i8GFYwImt5D5B8CPpi2jrDTy/faq4OEW+NkOTLSKcIdPfdYJvWv3VZddDKl0ByvBe6cJ2s5Mm2XDtv5c2pj/Eg==",
+          "dev": true,
+          "requires": {
+            "extsprintf": "1.0.2"
+          }
         }
       }
     },
@@ -6623,6 +6618,11 @@
         "lodash": "4.17.4"
       }
     },
+    "gitbook-plugin-copy-code-button": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/gitbook-plugin-copy-code-button/-/gitbook-plugin-copy-code-button-0.0.2.tgz",
+      "integrity": "sha512-47i/0/HQBb9Z7jSkfSkDuwP8vJw6gEpgvI4HTmuKGK4Vqd7mDIE3h/1HgJocLkqtz1/WwDPoU/vNiG/06J4x/Q=="
+    },
     "gitbook-plugin-fontsettings": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/gitbook-plugin-fontsettings/-/gitbook-plugin-fontsettings-2.0.0.tgz",
@@ -6630,12 +6630,11 @@
       "dev": true
     },
     "gitbook-plugin-highlight": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/gitbook-plugin-highlight/-/gitbook-plugin-highlight-2.0.2.tgz",
-      "integrity": "sha1-AmUHIKtZTHmblFF4WWD+QXytgEY=",
-      "dev": true,
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/gitbook-plugin-highlight/-/gitbook-plugin-highlight-2.0.3.tgz",
+      "integrity": "sha512-ahyWXKr1WhEYHbiezJD9jydht0+J6BvXrAv0AHzjft+IkFjZt9uYIygQGCJxi/KgyDcmOimWFm9Jv51YE8/4aQ==",
       "requires": {
-        "highlight.js": "9.2.0"
+        "highlight.js": "9.8.0"
       }
     },
     "gitbook-plugin-include-codeblock": {
@@ -6842,10 +6841,9 @@
       }
     },
     "highlight.js": {
-      "version": "9.2.0",
-      "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.2.0.tgz",
-      "integrity": "sha1-DU72EnnEBn2lXt+JdvG58o9p8gI=",
-      "dev": true
+      "version": "9.8.0",
+      "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.8.0.tgz",
+      "integrity": "sha512-wVMPeK1JZ6AK8+daRQx/65MUJPygjfFfM0WhQq9FBvoShyKAfn9L+fRCudbSpcRg7vxVSqRms7RM4zCK9Ok4Lw=="
     },
     "hoek": {
       "version": "4.2.0",
@@ -7376,7 +7374,7 @@
     "jsprim": {
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/jsprim/-/jsprim-1.4.1.tgz",
-      "integrity": "sha1-MT5mvB5cwG5Di8G3SZwuXFastqI=",
+      "integrity": "sha512-4Dj8Rf+fQ+/Pn7C5qeEX02op1WfOss3PKTE9Nsop3Dx+6UPxlm1dr/og7o2cRa5hNN07CACr4NFzRLtj/rjWog==",
       "dev": true,
       "requires": {
         "assert-plus": "1.0.0",
@@ -8018,6 +8016,12 @@
           "bundled": true,
           "dev": true
         },
+        "extsprintf": {
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/extsprintf/-/extsprintf-1.0.2.tgz",
+          "integrity": "sha512-g21Br4ELmVaKCVSUSSTXecKG+MiLcHFoby5RPPUmfZdhQTontXUOPf0QK/TvreRjgItRiyO928zxR4TCrnuwmA==",
+          "dev": true
+        },
         "fs-vacuum": {
           "version": "1.2.9",
           "bundled": true,
@@ -8273,6 +8277,23 @@
             }
           }
         },
+        "json-schema": {
+          "version": "0.2.2",
+          "resolved": "https://registry.npmjs.org/json-schema/-/json-schema-0.2.2.tgz",
+          "integrity": "sha512-DFzwwaFNKI+cfMyHtcyGA6N9d8jOWEtLc9IrT7WbpZc1V8M5S/HMBjJ3aM2Fx40bcTL2xTuIX/bBr8Zj2soGyg==",
+          "dev": true
+        },
+        "jsprim": {
+          "version": "1.2.2",
+          "resolved": "https://registry.npmjs.org/jsprim/-/jsprim-1.2.2.tgz",
+          "integrity": "sha512-hTAms4cBEbKR9iSUi+v7AyTvfyPUWssZqEUBsoDE96bM/sdackVTlDFQWznBxvJwsgdJZqwUBH/IO12HHt0y6w==",
+          "dev": true,
+          "requires": {
+            "extsprintf": "1.0.2",
+            "json-schema": "0.2.2",
+            "verror": "1.3.6"
+          }
+        },
         "lockfile": {
           "version": "1.0.1",
           "bundled": true,
@@ -9442,36 +9463,6 @@
                   "bundled": true,
                   "dev": true
                 },
-                "jsprim": {
-                  "version": "1.2.2",
-                  "bundled": true,
-                  "dev": true,
-                  "requires": {
-                    "extsprintf": "1.0.2",
-                    "json-schema": "0.2.2",
-                    "verror": "1.3.6"
-                  },
-                  "dependencies": {
-                    "extsprintf": {
-                      "version": "1.0.2",
-                      "bundled": true,
-                      "dev": true
-                    },
-                    "json-schema": {
-                      "version": "0.2.2",
-                      "bundled": true,
-                      "dev": true
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-                    "verror": {
-                      "version": "1.3.6",
-                      "bundled": true,
-                      "dev": true,
-                      "requires": {
-                        "extsprintf": "1.0.2"
-                      }
-                    }
-                  }
-                },
                 "sshpk": {
                   "version": "1.7.4",
                   "bundled": true,
@@ -9767,6 +9758,15 @@
             }
           }
         },
+        "verror": {
+          "version": "1.3.6",
+          "resolved": "https://registry.npmjs.org/verror/-/verror-1.3.6.tgz",
+          "integrity": "sha512-i8GFYwImt5D5B8CPpi2jrDTy/faq4OEW+NkOTLSKcIdPfdYJvWv3VZddDKl0ByvBe6cJ2s5Mm2XDtv5c2pj/Eg==",
+          "dev": true,
+          "requires": {
+            "extsprintf": "1.0.2"
+          }
+        },
         "which": {
           "version": "1.2.8",
           "bundled": true,