Updates to work in CSS3 and XML

Many dev use this CSS3 package:  https://github.com/y0ssar1an/CSS3_Syntax

Unfortunately it changes the mode to css3 rather than just CSS. This fixes that.

And for XML - this plugin is great when you are editing .tmTheme (sublime theme files) because you can see the colours in the sidebar. 

![](http://wes.io/WQAt/content)
Merge pull request #42 from wesbos/patch-3

Updates to work in CSS3 and XML