Any plans to update CssResource

[cbruno...@gmail.com]

Im using UiBinder and  source in a CssResource using <ui:style> in the .ui.xml file. I am always hitting a walling using modern CSS like :not selectors or var.  I know some workarounds to get these to work but im wondering what would it take to really make CssResource great again. Does the community here accept bounties?