Added width(). Try it out: width(2, 3). Presentational classes available too: .half, .third, .fourth, etc. to .twelfth
Removed funky float right thing. Add it manually if you need.
HOLY CRAP width() doesn't work because Stylus interprets width foosize as a mixin call

So if you actually wanted to use width 100% or something, it would
interpret it as width(100%) holy derpness. :O
Fixed span on w()