added GPL license, fixes for 90 degree pitch movement, and I term to the PD function
Merge pull request #17 from akadamson/experimental

GPL license added
fix for the autopan debugging printout so it will shut off
Merge pull request #18 from akadamson/experimental

fix for the autopan debugging printout so it will shut off
Adding USB trace (Work In Progress, but I want to merge the latest code).
Merge branch 'experimental' of https://github.com/EvvGC/Firmware into experimental

Conflicts:
	src/engine.c
	src/main.c