Renaming angular-cli.json to .angular-cli.json

As per angular/angular-cli/pull/4681

Author: d4nyll

public/docs/ts/latest/cli-quickstart.jade

@@ -266,7 +266,7 @@ block root-files
     .file src/...
     .file .editorconfig
     .file .gitignore
-    .file angular-cli.json
+    .file .angular-cli.json
     .file karma.conf.js
     .file package.json
     .file protractor.conf.js
@@ -308,7 +308,7 @@ table(width="100%")
       :marked
         Git configuration to make sure autogenerated files are not commited to source control.
   tr
-    td <code>angular-cli.json</code>
+    td <code>.angular-cli.json</code>
     td
       :marked
         Configuration for Angular-CLI.