all new architecture
Merge branch 'master' of https://github.com/LoicGoyet/smacss-in-less

# By Loic Goyet
# Via Loic Goyet
* 'master' of https://github.com/LoicGoyet/smacss-in-less:
  helpers
  box shadow mixin
  makes "easy to use" the style.less file, simplify the lineHeight mixin

Conflicts:
	less/mixins.less
	less/style.less