Merge pull request #46 from rotorz/master

Added global setting `suppress-responsive` which aims to tame older web ...
0.6.0
add support for fallback classes, closes #47
Merge pull request #49 from jenius/fallback-class

add support for fallback classes, closes #47
0.6.1
should > chai, iron out some small object comparison bugs
Added note to readme regarding inclusive behaviour of `+between` for issue #48.