Feature/modernizr 3.0 fix css false positives

As promised, this is me attempting to do a proper pull request for this fix.  I cannot figure out how to get GitHub to understand this pull request is for the 'feature/modernizr-3.0' branch -- it assumes I'm trying to push to master.  Maybe GitHub doesn't support this?  In any case, here it is.  Please let me know if I should do this differently somehow.

Thanks!