Add clearfix utility
Add clearfix utility

cllns/bourbon,smithdamen/bourbon,nagyistoce/sass-bourbon.io,chriseppstein/bourbon,jamesmenera/bourbon-libsass,Jazz-Man/bourbon,setie/bourbon,Nikeshsuwal/bourbon,nickg33/bourbon,mindeavor/bourbon,jamesmenera/bourbon-libsass,san650/bourbon,greyhwndz/bourbon,greyhwndz/bourbon,jamadam/bourbon-docs-jp,mindeavor/bourbon,zyj1022/bourbon,nickg33/bourbon,craftsmen/bourbon,thoughtbot/bourbon,jasonwalkow/bourbon,jamadam/bourbon-docs-jp,smithdamen/bourbon,jamadam/bourbon-docs-jp,setie/bourbon,ismarkunc/bourbon,jamadam/bourbon-docs-jp,jasonwalkow/bourbon,Jazz-Man/bourbon,thoughtbot/bourbon,craftsmen/bourbon,zyj1022/bourbon,chriseppstein/bourbon