LuaUnitDefs:
  add more is* functions for all unit-types known to Spring
  the complete list as of 95.0 is:
	isTransport
	isImmobile
	isBuilding
	isBuilder
	isMobileBuilder
	isStaticBuilder
	isFactory
	isExtractor
	isGroundUnit
	isAirUnit
	isStrafingAirUnit
	isHoveringAirUnit
	isFighterAirUnit
	isBomberAirUnit
  fully deprecate the following UnitDef keys:
  after 95.0 these will all become nil, beware
    .builder
    .floater
    .canDGun
    .canCrash
    .isCommander
    .moveData
    .type
    .maxSlope