Rover: fixed build
Copter: fixed for removed DCM blowup counts
AP_NavEKF: covariance protection (not enabled) and tuning changes for stability
autotest: a useful CMAC test pattern from Paul
autotest: kill off lt-JSBSim too

on some systems it gets this name
AP_NavEKF: allow filter to run as single or double precision

useful for checking if there are numerical precision issues
AP_NavEKF: fixed example for new API
DataFlash: added logging of AHRS2
SITL: added dataflash logging
Plane: added AHR2 and SIM logging
AP_NavEKF: added SIM state to playback tool