Fixing CSSNoise in various contexts

Also fixed CSSNoise in relation to CSS comments and added a test to fix

Added cssNoise to cssFontDescriptorBlock for consistency

Fixed Comments

By changing the order of when these matches are defined, we fix
comments inside of CSS definitions that were broken by the previous
commits

Adding tests for CSS Comments
Merge pull request #49 from amadeus/fix-css-noise

Fixing CSSNoise in various contexts