CSS Parser Code

code cleanup and unit tests added

simplified test

avoid System.err, use Logger instead

CSS2/CSS21/CSS3: Permit comments and whitespace before the @charset rule.

% import fixes

CSS3: Support dimensions (20px, 40deg) as function arguments.

plugin update

CSS3: support double colon notation for pseudo selectors and minor code cleanup

% typo fixes

CSS3: preserve whitespace inside function arguments