[tests] show warnings by default
[simulator] OCaml sim: simulate sys_time

should fix #962
[rotorcraft] datalink: check ac_id of RC_4CH message

should fix at least some of the problems described in #965
[modules] config_mkk_v2 settings to module
[OBC2014] Irrevisible failsafe on RC loss made optional in OBC rules
[conf] fix/part1
fix radio_control sbus_dual subsystem
[imu] fix default/weak implementation of imu_periodic

should fix #972
[airframe] different radio_control in simulation
[imu] fix unbelievably stupid copy paste error
[conf] fix OCaml sim freqs for some airframes
[ms5611] Fix baro i2c transactions