Fixed canvas view to clearRect() in erase() so that it works properly with transparent backgrounds.
Fixed canvas view to clearRect() in erase() so that it works properly with transparent backgrounds.

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