stub out ivory hx stream
begin ivory-hxstream, rename cabals
bsp initialization files renamed
hxstream encodek untested
ivory-bsp-stm32f4: add uart peripheral bitdata
hxstream warning wibble
smaccm-mavlink: add gitignore.
px4 linker: fix bug to choose bootloader.
sample-rtv-task: just casting and unused var warnings now.
sample-rtv-task: remove more warnings.
sample-rtv-task: move ad-hoc .c and .h files to subdirs.
custom Config.mk
sample-rtv-task: update build.mk.