usage statement more or less done. on to arg parsing.
Merge branch 'master' of https://github.com/nearwood/rpi-drd

Conflicts:
	README.md
updated test.py script to verify encoders work. working on encoders in c.
input working, event stuff not working
motors run and speed ... doesn't really work but the code is there.
Afixed speed sort of. encoder a might be slightly off, not reading so much
A