parameters: add missing units attribute.
parameters: added 'Eng (*) N1 Min For 5 Sec'
parameters: tidy up some engine parameter code.
parameters: added 'Eng (*) Fuel Burn'
parameters: added 'Eng (*) Fire'
kpv: 5 sec update for 'Eng N1 500 To 50 Ft Min'

Use 'Eng (*) N1 Min For 5 Sec' to avoid transient dips from triggering
the KPV. Prevents raising excess events in turbulent conditions.
parameters: tidy: use any_of(), clean comments
kpv: added eng fire warning duration
kpv: add/fix takeoff configuration warning.
kpv: add hdg var 300-50ft
Merge branch 'master' of github.com:FlightDataServices/FlightDataAnalyzer