todo update
bump submodule.
bump submodule (fixed warnings).
bump stm32f4: bugfix for mavlink names of parameters
push mavlink submodule.
build: add phony target to force mavlink rebuild, if required.
bump gateway.
bump smaccmpilot & mavlink: heading control works
bump submodule.
bump submodule.
mavlink.mk: wibbles
bump mavlink submodule
bump ivory.
bump stm32f4 submodule.
bump submodule.
bump stm32f4 submodule.
bump mavlink.
bump submodules.
bump submodules.
bump submodule.