The status of a System with regards to a FactionWar. Who controls what and what System is
contested Attributes:
- system_id ( Fixnum ) - ID of the System
- system_name ( String ) - Name of the System
- faction_id ( Fixnum | NilClass ) - ID of the Faction that is occupying this
System. If no Faction controls this System this will be nil.
- faction_name ( String | NilClass ) - Name of the Faction that is occupying
this System. If no Faction controls this System this will be nil.
- contested ( Boolean ) - Is this System contested?