twbs/bootstrap — pull request #9203 by ggam (2013-08-07 19:17:17+00:00)
Title: Added missing grid make-column mixins and fixed some inconsistencies

make-column() was still generating "medium size" columns (col-sm-x), while make-small-column created the default columns (col-x)
I have also changed @grid-float-breakpoint to @screen-small, as it was used in make-row() and I think it makes more sense here than the other.