First version of AI_A2G_DISPATCHER ...

- Created a new AI_AIR class. AI_A2A and AI_A2G inherit from AI_AIR.
- Created a new AI_A2G_DISPATCHER class.
- Created a new AI_A2G_ENGAGE class, that implements the SEAD, CAS and BAI actions.
- The AI_A2G_DISPATCHER implements now:
  * SEAD, CAS and BAI attacks from airbases.
  * AddDefenseCoordinate() to set a defense coordinate.
  * RemoveDefenseCoordinate() to remove a defense coordinate.
  * SetDefenseReactivenessHigh() for high reactiveness.
  * SetDefenseReactivenessMedium() for medium reactiveness.
  * SetDefenseReactivenessLow() for low reactiveness.
  * Overhead for ground attacks.
  * Grouping for ground attacks.
  * Evaluates task type based on enemy group composition.

- Tested AI_A2A_DISPATCHER for backward compatibility.
- Implemented spawning of airplanes in AI_A2A_DISPATCHER:
  * SetSquadronVisible() method to make the squadron visible at the airport.

Moose Development/Moose/Wrapper/Controllable.lua

@@ -712,7 +712,7 @@ function CONTROLLABLE:TaskAttackUnit( AttackUnit, GroupAttack, WeaponExpend, Att
       groupAttack = GroupAttack or false,
       visible = Visible or false,
       expend = WeaponExpend or "Auto",
-      directionEnabled = Direction and true or false,
+      directionEnabled = Direction and true or nil,
       direction = Direction,
       altitudeEnabled = Altitude and true or false,
       altitude = Altitude or 30,