Update _redirects

Author: mansona

_redirects

@@ -13,5 +13,11 @@
 /using-modules https://cli.emberjs.com/release/basic-use/folder-layout/ 301!
 /why https://cli.emberjs.com/release/ 301!
 /overview https://cli.emberjs.com/release/ 301!
+/naming-conventions https://cli.emberjs.com/release/basic-use/folder-layout/ 301!
+/getting-started https://cli.emberjs.com/release/basic-use/cli-commands/ 301!
+/ https://cli.emberjs.com/release/ 301!
+/user-guide https://cli.emberjs.com/release/ 301!
+/extending https://cli.emberjs.com/release/ 301!
+
 http://blog.ember-cli.com https://cli.emberjs.com/release/ 301!
 https://blog.ember-cli.com https://cli.emberjs.com/release/ 301!