Added a new animation test called Flip

It uses Transform: RotateX and SkewX, which aren't support in webkit, even
with -webkit-transform. This was to test how my getTotalTransitionTime
method would deal with none supported css when figuring out the transition
time. As I expected it doesn't actually get added to the elements style so
my method returns "0s" if it's the only transition there
added karma to devDependencies
init setup for Karma testing
ok NOW karma is set up
Merge branch 'testing' of https://github.com/Harris-Miller/Popups into testing