AUI-1226 Change button sizes from .btn-[mini|small|large] to .btn-[xs|sm|lg] on Bootstrap 3
AUI-1224 Add .glyphicon and change prefix from .icon-* to .glyphicon-* on Bootstrap 3
AUI-1223 Use <span> instead of <i> when creating icons on Bootstrap 3
AUI-1221 Remove .btn-inverse since it has been deprecated on Bootstrap 3
AUI-1222 Add .form-control to inputs and selects on Bootstrap 3
AUI-1220 Add .btn-default to .btn elements with no other color on Bootstrap 3
AUI-1225 Update Grunt bootstrap task to Bootstrap 3