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
DoubleCheckedLocking no longer supported
remove username from pom.xml again
