Fixed README.md - Grunt script converts to SASS, not to LESS
Fixed README.md - Grunt script converts to SASS, not to LESS

nkraft/bootswatch,nicolasmccurdy/bootswatch,douglaskastle/bootswatch,douglaskastle/bootswatch,CramFighter/bootswatch,jipexu/bootswatch,nicolasmccurdy/bootswatch,douglaskastle/bootswatch,nicolasmccurdy/bootswatch,CramFighter/bootswatch,thomaspark/bootswatch,thomaspark/bootswatch,jipexu/bootswatch,thomaspark/bootswatch,CramFighter/bootswatch,Prodrivers/bootswatch,Prodrivers/bootswatch,jipexu/bootswatch,Prodrivers/bootswatch,douglaskastle/bootswatch,nkraft/bootswatch,nkraft/bootswatch