Improve I2C address comment. Make filter much stronger to damp any non-realistic vehicle motion.
mTECS: Note better filter defaults to get airspeed response a bit smoother. Damp also ACC response with filter more than currently
Merge branch 'filter_mode' into asfilter
Merge remote-tracking branch 'upstream/master' into asfilter
Increase filter pass-band
Merge branch 'master' of github.com:PX4/Firmware into asfilter
Revert "Remove all unused TECS parameters"

This reverts commit ce78b399691d43bd150c0a5928f08c98076a3892.

Conflicts:
	src/modules/fw_pos_control_l1/fw_pos_control_l1_main.cpp
	src/modules/fw_pos_control_l1/fw_pos_control_l1_params.c
Re-instate TECS default gains
Revert "Remove old TECS implementation - we can really only decently flight-test and support one."

This reverts commit 503ded05394767d58359834e73bc63672b701dbe.

Conflicts:
	mavlink/include/mavlink/v1.0
	src/modules/fw_pos_control_l1/fw_pos_control_l1_main.cpp
Make airspeed filter a bit smoother, but do not induce a huge phase delay
Re-add two params that fell off the truck before
Make ext libs more flash efficient
Make ECL more flash efficient
Merge branch 'master' of github.com:PX4/Firmware into asfilter
NaN check and better init in lowpass
Merge branch 'master' of github.com:PX4/Firmware into asfilter
Disable mTECS until runtime error is better understood
Fix threading in FW pos controller
Merge pull request #1222 from PX4/asfilter

Airspeed filtering, reinstate TECS for testing