Passing over the GuitarTestImag I made.
merging in commit.
Merge branch 'tile_assembly' of https://github.com/correlllab/cu-droplet into tile_assembly
Merge branch 'tile_assembly' of https://github.com/correlllab/cu-droplet into tile_assembly
Did some cleaning up for the tile_assembly, particularly with getting rid of move_to_center and start_broadcast routines.
Moved much of the stuff we were doing awkwardly in waiting_for_message to a pre_assembly state.