Moved back to the last commit where the code worked.
   Gradually readding improvements back in.
Cleaned up code and added back blink function
more code cleanup
Added back in more features
Delete tube_old.c file
Started work on clock assembly guide
Updated parts list, created doc folder
More code cleanup.
Moved some setup in main to its own function
Merge branch 'old-branch'

Conflicts:
	Makefile
	blink.c
	tube.c
	tube.h