Feature Request : Gradient Support

It would be nice to have css gradient support like
````
background: blue; /* For browsers that do not support gradients */
background: -webkit-linear-gradient(left, red , yellow); /* For Safari 5.1 to 6.0 */
background: -o-linear-gradient(right, red, yellow); /* For Opera 11.1 to 12.0 */
background: -moz-linear-gradient(right, red, yellow); /* For Firefox 3.6 to 15 */
background: linear-gradient(to right, red , yellow); /* Standard syntax */
````

The issue names no file, test, or entry point. Start by locating how background styles are parsed and rendered in JASONETTE-iOS, then compare that path with the linear-gradient examples in the issue. Done means the requested CSS gradient syntax is supported and covered by a suitable rendering or behavior test.

Written by the indexing model from the issue text.