Merged master into ros

makefiles/config_px4fmu-v1_default.mk

makefiles/config_px4fmu-v2_default.mk

makefiles/config_px4fmu-v2_test.mk

src/drivers/boards/px4fmu-v1/board_config.h

src/drivers/ms5611/ms5611.cpp

src/drivers/ms5611/ms5611.h

src/drivers/ms5611/ms5611_i2c.cpp

src/drivers/ms5611/ms5611_spi.cpp

src/drivers/px4io/px4io.cpp

src/modules/systemlib/err.h

src/modules/uORB/uORB.cpp

src/systemcmds/tests/module.mk

src/systemcmds/tests/test_mtd.c

src/systemcmds/tests/tests.h

src/systemcmds/tests/tests_main.c

unittests/CMakeLists.txt

unittests/sbus2_test.cpp