@moriarty
Don't merge to the main branch yet!
-create a simulation world for pick cubes to bins demo for fetch_demos/grasp_cube_demo
-add four colors for bins and cubes
-temporarily added cubes and bins in fetchit_challenge but removed them in the end
@moriarty Don't merge to the main branch yet! -create a simulation world for pick cubes to bins demo for fetch_demos/grasp_cube_demo -add four colors for bins and cubes -temporarily added cubes and bins in fetchit_challenge but removed them in the end