Fixed CSS Hack Contain

In my implementation of cssHacks, I accidentally included it in cssMedia
block, which breaks the * selector within a media declaration.
Containing it within cssDefinition should be the only requirement.
Including cssAttributeSelector in cssMediaBlock

I forgot to include my tweaks to cssAttributeSelector within
cssMediaBlock, therefore it wouldn't work within an @media query.

This fixes that by now including it.
Merge pull request #28 from amadeus/fixes

Fixes for cssHack and cssAttributeSelector