Added GIT version which recompiles on each build

Makefile

msg/vehicle_status.msg

src/modules/mavlink/mavlink_main.cpp

src/modules/sdlog2/module.mk

src/modules/sdlog2/sdlog2.c

src/modules/systemlib/.gitignore

src/modules/systemlib/git_version.h

src/modules/systemlib/module.mk

src/modules/uavcan/module.mk

src/modules/uavcan/uavcan_main.cpp

src/systemcmds/ver/module.mk

src/systemcmds/ver/ver.c