MAVLink app: Fix rate handling

Update Matrix.hpp (PX4#4966)

This was horribly wrong. Matrix is first cast into a matrix of size NxM (which is supposed to be the size of the result - NOT the starting point) so the transpose result becomes garbage. Instead make "Me" an MxN matrix as the original. Took me a whole evening to figure out this problem. Now my Kalman filter finally returns good results.

v1.4.0 transitional support for battery count

Fix MAVLink reporting of Firmware version, implement dev / release ve…

…rsion reporting

Strip ESC calib commandline tool

travis-ci fix git shallow clone for git ver (PX4#4885)

px4io: set safety on before going into bootloader (PX4#4860)

Sometimes when flashing new firmware, the IO update fails because safety
is off. In this case, we should set safety on first before putting the
IO board into bootloader mode.

Updated IRIS params

land_detector: fix timestamp type (PX4#4710)

The overflow of the uint32_t lead to the land_detector start getting
aborted.

SBUS decoding: Fix channel 18 return value