docs($q): missing finally notifyCallback API

finally allows for notifyCallback and is missing in the Docs
https://github.com/angular/angular.js/blob/v1.3.2/src/ng/q.js#L288

Closes #10010
docs($controller): mention "controller as" syntax

Closes #10011
feat(ngPluralize): add support for bind-once in `count`

Closes #10004
refactor(ngPluralize): minor refactoring to avoid repetition

Move regular expression outside of the `link` function (so it doesn't get
created for every instance of `ngPluralize`.
Replace `RegExp.test + String.replace + String.replace` with `RegExp.exec
+ string concatenation`.