Added: ICBM Mod Support

Added: Planes shown on Radar (When "OnRadar True" is added to config)
Added: Planes engaged by AA Guns (When "OnRadar True" is added to
config)
Added: Planes engaged by Antibalistic Missiles (When "OnRadar True" is
added to config)

Todo: Planes shown as entity.plane.Name on Radar (disgusted with Flan)
Planes are not damaged, a proper damage source is needed (disgusted with
Flan)
Player / planes need to register/unregister to the radar when entering
the plane/leaving and when dispawning the plane by rightclick with
RadarRegistry.register(this); and RadarRegistry.unregister(this);
Hopefully Flan can do this because he knows where the functions are
Merge pull request #252 from Minecraft-SMP/ICBMMod

Icbm mod API