vertical-rhytm fix for small element
Merge pull request #141 from Coobaha/master

vertical-rhytm and typography fix for small element
0.2.2
update test readme badge
update npm name in readme
add a note about docs
px as a string
sprite also
and all the others
Merge pull request #146 from Coobaha/fix/image-replacement-units

unit type in mixins
big code cleanup, better docs and bugfixes

- improve internal docs, make formatting more consistent
- remove dollar signs before mixin names
- fix a variety of small bugs that worked their way in
Merge pull request #144 from jenius/cleanup

big code cleanup, better docs and bugfixes
fix for additive button mixin
fix a couple more bugs with dollar mixins
variety of small style and internal doc fixes
hr fix