aui:col tag should support Bootstrap 3's grid breakpoint sizes

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 M3
• Fix Version/s: 7.0.0 M3
• Component/s: Frontend Infrastructure
• Labels: None

Bootstrap 3 has different break point sizes available to it's grid system; col-xs-x, col-sm-x, col-md-x, and col-lg-x.

aui:col uses the grid system but always defaults to col-md-x, it should have the option of specifying the breakpoint size.