Move parsing of clip-path to a pre-defined function.
Add parsing for basic shapes (without polygon).
Add parsing for polygon(). Support for fill-rule needs to be added.
Add fillrule parsing to polygon. Parsing should be complete now.
Add nsStyleBasicShape and nsStyleClipPath.
Add runtime flag for clip-path shapes.
Parser clean up
Use new parsed data in nsRuleNode - compiles but tests fail