Updated Craft MaxMass -> MaxInventoryMass

All instances of ACraft's `MaxMass` have now been replaced with `MaxInventoryMass` to accomodate cortex-command-community/Cortex-Command-Community-Project-Source#274 .
This value has also been modified to only include the Actor's inventory items, not the actors mass as well. As such, all Craft have had their mass subracted from their `MaxMass` value.

Author: traunts

Base.rte/Craft/Dropships/DropshipMK1.ini

@@ -1436,7 +1436,7 @@ AddActor = ACDropShip
 	Description = Trade Star's reliable and safe dropship. Its tough armor can withstand numerous hits while delivering or transporting troops to the field. Its powerful thrusters allow it to carry even very heavy loads. Equipped with two underslung machine gun turrets.
 	AddToGroup = Craft
 	Mass = 2400
-	MaxMass = 4220
+	MaxInventoryMass = 800
 	MaxPassengers = 4
 	HitsMOs = 1
 	GetsHitByMOs = 1

Base.rte/Craft/Rockets/MK2/RocketMK2.ini

@@ -526,7 +526,7 @@ AddActor = ACRocket
 	Description = Trade Star's newest delivery purpose rocket. Much stronger and resiliant than the older Mk1. Features more powerful thrusters and cool modern design.
 	AddToGroup = Craft
 	Mass = 1000
-	MaxMass = 1750
+	MaxInventoryMass = 600
 	MaxPassengers = 3
 	HitsMOs = 1
 	GetsHitByMOs = 1

Base.rte/Craft/StorageCrate/Crate.ini

@@ -51,7 +51,7 @@ AddEffect = MOSRotating
 AddActor = ACRocket
 	PresetName = Crate
 	Mass = 300
-	MaxMass = 600
+	MaxInventoryMass = 300
 	MaxPassengers = 1
 	Position = Vector
 		X = 0

Dummy.rte/Craft/Dropships/Dropship.ini

@@ -1213,7 +1213,7 @@ AddActor = ACDropShip
 	Description = Armored aerial transport. Reliable and stable.
 	AddToGroup = Craft
 	Mass = 2000
-	MaxMass = 3420
+	MaxInventoryMass = 700
 	MaxPassengers = 4
 	HitsMOs = 1
 	GetsHitByMOs = 1

Dummy.rte/Craft/Rockets/Rocklet.ini

@@ -295,7 +295,7 @@ AddEffect = ACRocket
 	Description = Small and compact space transport. Incredibly light and fast.
 	AddToGroup = Craft
 	Mass = 600
-	MaxMass = 980
+	MaxInventoryMass = 300
 	MaxPassengers = 2
 	DeliveryDelayMultiplier = 0.8
 	HitsMOs = 1

Ronin.rte/Craft/Rocket/RocketMK1.ini

@@ -82,7 +82,7 @@ AddActor = ACRocket
 	Description = Trade Star's standard delivery rocket. Outdated model, but its still very popular because of its economic price and good durability.
 	AddToGroup = Craft
 	Mass = 900
-	MaxMass = 1550
+	MaxInventoryMass = 500
 	MaxPassengers = 3
 	Velocity = Vector
 		X = 0