Added libgovernor as submodule.
Change api to match older interface structure.
Added governor test.
Updated libgovernor.
Corrected byte types used in the usart test and driver.
Updated libgovernor.
Removed olconfgen from the makefile as we are not using that any mare.
Updated locm3.
Added a very simple and dumb script that fetches and builds all the ext submodules.
Added semihosting support and test.