:android now builds with gradle!
:demos:snake:android ported just enough to compile.
:demos:helloworld:android ported just enough to compile.
freshen tags file.
Freshen TODO file.
Clean up support files.

run.sh/run.cmd now do installApp with gradle wrapper, so a test can
basically be ./run.sh demoname.

Also:

	rm Makefile
	rm scripts/tags.cmd
	mv scripts/* ./