0.2.0

• Use squirrel classes instead of BB classes for dynamic spawns objects.
• Add a new base spawnable class that party, unitblock and unit inherit from.
• Add weighted random capability for unit blocks.
• Add Categories system for parties
• Add capability to have Variants for parties
• Use BaseID instead of ID to base a partydef on another one
• Allow StaticUnitDefs instead of StaticUnitIDs in party defs
• Add WeightedArray class that inherits from MSU Weighted Container (probably will be removed in a later update).