New names for the Susy +columns() mixin

columns.scss

// This must be an old conflict, but I never noticed it until today:
//
// w3c      : http://www.w3.org/TR/css3-multicol/#columns0
// Compass  : http://compass-style.org/reference/compass/css3/columns/
// Susy     : https://github.com/ericam/susy/blob/master/REFERENCE.mkdn#mixins
//
// In the w3c spec, 'columns: $number' can be used to split content into a $number of columns.
// Compass has a CSS3 'columns()' mixin, that works with the w3c spec.
// In Susy, we have a competing 'columns()' mixin that _spans_ columns rather than _splitting_ them.
//
// Time for an API name change! 
//
// Between these three, I lean strongly towards the clarity of #3.
// But you might have even more ideas...?

/* 1. short */
@include cols(2);

/* 2. name-spaced */
@include susy-columns(2);

/* 3. clarified (by Chris Eppstein) */
@include span-columns(2);

@ericam thanks, didn't realize that!