Added support for IO bootloader revision 3 on FMU
Started with px4io stop implementation
Suppress annoying C++ ABI portability warnings

This suppresses an otherwise not useful warning when mixing C++ and va_list
Merge pull request #143 from julianoes/feature_io_bl_rev3

Added support for IO bootloader revision 3 on FMU
Merge branch 'master' of github.com:PX4/Firmware into fixedwing