Migrated lookup tables to FlightDataAircraftTables.

- Adds support for overriding the basic default lookup tables.
- Fixed get_lever_detents() to also return available flap detents.
- Ensure that all table accessors can retrieve by aircraft model.
- Attempt to coerce non-string detents in v-speed lookups and warn.
- Converted all lookups to work for model, series and family.
- Merged stabilizer trim limits into model information module.
- Made VMO/MMO lookup tables less cumbersome - extracted common code.
- Documented aircraft table related code and detailed format of mappings.
- Added numerous additional unit tests and improved others.