Improvements to the Makefile
Updating the Libraries Makefile, too
fixing up gdb commands to match openocd path in Makefile. Also adding a section to the README about on-chip debugging
Merge remote-tracking branch 'origin/stm32f0-discovery-basic-template' into puzzle_box

Conflicts:
	Libraries/Makefile
	Makefile
	README.md
	extra/gdb_cmds

Kept my versions of the README and gdb_cmds...merged the conflicts in the Makefiles.