Tests: remove all the empty line whitespace
Core: Fix trim in Android<4.1
Css: Don't check fill-opacity in Android 2.3, it's not supported
Event: Blacklist the onbeforeunload test in Android 2.3

Similarly to iOS, Android 2.3 has the onbeforeunload property on window
but doesn't support the event. This commit blacklists the test there as well.
Effects: Don't check fill-opacity in Android 2.3, it's not supported
Support: Skip style-based tests when element.style is undefined

Fixes #14785
Ref #13754
Ref badcd1b6f301e6253405f17759c1270549a34e12
Support: Reduce size

Ref a7ea12a9a7c696a14455bfe4bfebf984dd329832
Bower: add main property, move Sizzle to devDependencies, add license property

Fixes #14798
Close gh-1516
Ref gh-1338
Bower: stop ignoring yourself, bower

Ref #14798
Ref gh-1516
Ref gh-1338