ekf_att_pos_estimator: fixed files names and perf counters names
ekf_att_pos_estimator: module.mk fixed
Merge pull request #971 from PX4/ekf_cleanup

akf_att_pos_estimator: cosmetic cleanup
commander: missed 'break' in 'switch' added
Merge remote-tracking branch 'upstream/master' into mtecs
Merge remote-tracking branch 'upstream/mtecs' into mtecs