Added remove method to Collider.
Added remove method to Collider.

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