MD CSS: Add .md-card-shell for padding-free cards.
MD CSS: Add .md-card-shell for padding-free cards.

osric-the-knight/foam,jacksonic/foam,foam-framework/foam,jacksonic/foam,foam-framework/foam,jlhughes/foam,jlhughes/foam,mdittmer/foam,mdittmer/foam,jlhughes/foam,osric-the-knight/foam,osric-the-knight/foam,jacksonic/foam,osric-the-knight/foam,jacksonic/foam,foam-framework/foam,foam-framework/foam,jlhughes/foam,mdittmer/foam,foam-framework/foam,mdittmer/foam