books: add new v2.0.0 version stamp

Steve Hollasch · hollasch · commit 128491bc71d9 · 2019-10-07T22:10:31.000Z
diff --git a/books/RayTracingInOneWeekend.html b/books/RayTracingInOneWeekend.html
@@ -5,7 +5,7 @@
 
                                    **Ray Tracing in One Weekend**
                                            Peter Shirley
-                                            Version 1.54
+                                     Version 2.0.0, 2019-Oct-07
                     <br>Copyright 2018-2019. Peter Shirley. All rights reserved.
 
 
diff --git a/books/RayTracingTheNextWeek.html b/books/RayTracingTheNextWeek.html
@@ -5,7 +5,7 @@
 
                                    **Ray Tracing: The Next Week**
                                            Peter Shirley
-                                            Version 1.41
+                                     Version 2.0.0, 2019-Oct-07
                     <br>Copyright 2018-2019. Peter Shirley. All rights reserved.
 
 
diff --git a/books/RayTracingTheRestOfYourLife.html b/books/RayTracingTheRestOfYourLife.html
@@ -5,7 +5,7 @@
 
                                **Ray Tracing: The Rest of Your Life**
                                            Peter Shirley
-                                           Version 1.123
+                                     Version 2.0.0, 2019-Oct-07
                     <br>Copyright 2018-2019. Peter Shirley. All rights reserved.
 
 
