CSS Transitions : Add support for the background property and animation names

Hi,

The more i use animations and transitions the more additional property's i need.
Right now i can make gradients in the background property (with
-webkit-gradient) but the transitions spec doesn't have support for
the background property.. which is odd since it has support for other
background-* property's..
As for the animations spec. The animations you make (and define in
keyframe names like: @-webkit-keyframes custom_animation) are also not
supported in the transition spec.. It would be nice if those animation
names ("custom_animation" in this case) could also be supported.

imho all properties available in css should be supported in the
transitions module but that might be a bit overkill for some (like why
support the "display" property)

Regards,
Mark