fixed concat banner version number, updated various prefixes and the docs
bumped version
updated grunt bump config
added forgotten comma
v2.0.21
updated docs, version number and example stylesheet
v0.0.1
v0.0.2
removed prefixes, please use Autoprefixer instead
removed all prefix includes, changed some includes to extends
fixed some bugs with extend missing a % character, updated docs and dist
Merge branch 'master' into gh-pages

* master:
  fixed some bugs with extend missing a % character, updated docs and dist
  removed all prefix includes, changed some includes to extends
  removed prefixes, please use Autoprefixer instead
  v0.0.2
  v0.0.1
  updated docs, version number and example stylesheet
  v2.0.21
  added forgotten comma
  updated grunt bump config
  bumped version
  fixed concat banner version number, updated various prefixes and the docs