This is a big change that break compatiblity with existing applications
*and* with existing installed versions of main.py.
When upgrading it is import to update main.py:
./tools/wasptool --upload wasp/main.py
At this point both the simulator and a PineTime will come up
and show a clock (although in the case of the PineTime the clock
will just come up at 12:00).
