Use default edge and node classes in abstract engine
Use default edge and node classes in abstract engine

jeremyf/rom,denyago/rom,dekz/rom,Snuff/rom,pdswan/rom,kwando/rom,pxlpnk/rom,pvcarrera/rom,endash/rom,rom-rb/rom,dcarral/rom,rom-rb/rom,vrish88/rom,rom-rb/rom,cored/rom