Force Latitude and Longitude Prepared to 1Hz operation as latitude & longitude can be recorded at 0.25Hz.
Added A300 speedbrake selected
amended rejected takeoff to check for liftoff following 30 seconds after potential rto
Derived parameter approach_range amended to allow for visual approaches (i.e. glideslope not tuned or not recorded) to runways with an ILS installed.
Library function air_track extensively reworked to allow for long distance flights. More work needed in future, hence old code with correction terms retained as comments.
handle unknown ILS antennae coordinates for ILS established approches in ApproachRange
Standardise units for control forces.
Takeoff and Landing pilot fix for AP Engaged check
 - didn't reference kti.index
 - value_at_index is not great with multistates and that accuracy is not required
Takeoff and Landing Pilot now ignores '-' state
 - ensures most common value finds correct state during landing phase
most_common_value and unique_value return None or {} if all data is masked.
split segment slice.stop made a little more accurate
AP Engaged and Disengaged use Fast section so as to include disengagement after touchdown.
Ideally we need a more encompassing flight phase from acceleration start to turn off runway.
ThrustReversers can_operate now allows for Deployed without Unlocked available.
Fixes as flap and slat are multi-states!

- Don't use raw array when working with Flap Lever:
  - Raw values may not be what you expect, e.g. 1 = 'Lever 0'
  - Multiple state names for clean configuration, e.g. '0', 'Lever 0'.
- Extended some test cases to check the above.
- Improved and added some docstrings.
- Fix 'Slat', 'Flap' and 'Flaperon' - use M() not P()!
- Fix test cases broken by past configuration changes.
- Fix test cases broken by past refactoring.
Fix flap/slat-related KTIs.

- Replace node FlapSet with FlapLeverSet.
- Remove the node SlatSet.
- Fix FlapLeverSet to make use of states, not raw array.
- Update test cases and update KTI creation.
Changed alpha floor duration to only detect once in the air
amended TAWS windshear KPV's to detect at takeoff aswell as landing
missed some unittest changes from the earlier Alpha floor commit
APU Running named explicitly to maintain upper case into the parameter name.