Mike's bootloader added
Mike's bootloader sources + added as option, for Taranis only for now (not as clean as it could be, bootloader is always built even if not selected - didn't find how to nest ifs in makefile :\ ) (Issue #546)
obj dir not required anymore for bootloader
Merge remote-tracking branch 'origin/next' into kilrah/Bootloader

Conflicts:
	radio/src/Makefile
Some duplicated files removed
More cleaning in bootloader
PCBX9D replaced everywhere by PCBTARANIS
7 files removed
2 other files removed
Sky9x files removed for now
Sky9x files removed for now
Merge branch 'kilrah/Bootloader' of https://github.com/opentx/opentx into kilrah/Bootloader
1 more file removed
More Sky9x bootloader files removed
2 files removed
18 more files removed
3 files removed
one more file removed
4 more files removed
5 more files removed