feat(ngTap): Add a CSS class while the element is held down.
docs(injector): fix typo

Closes: #2551
test(ngAnimate): also provide W3C transition property to work on IE10

Closes: #2492
fix($location): back-button should fire $locationChangeStart

Before $locationChangeStart event is not broadcast when pressing the back-button on the browser.

Closes #2109
fix($rootScope) ensure $watchCollection correctly handles arrayLike objects
fix(ngRepeat): correctly iterate over array-like objects

Check if the object is array-like to iterate over it like it's done with arrays.

Closes #2546