Overflow revert was completely borked when you animated multiple properties (like in .show() or .hide()) (see bug #1343).

The browser.version check was causing browsers with undetected useragents to die. This, at least, makes it fail gracefully.

Fix for #1214, #1216, #1234 (problem with animations). In a nutshell, the callback needs to occur even if the animation does not run.

Removed useless safari workarounds, added rerun-single-test feature: just doubleclick on a single test to execute that one, use browser's back button get back to executing all