Fixed & Tested: ParticipantManagerImpl
Added: EnumDestructionType values 'left' and 'removed'
Updated: little optimization in MatchManagerImpl
Added: SolarSystemPopulationManager implementation (partial)
Added: Galaxy.maxGap
Added: SolarSystemPopulation.storedInfrastructure
Added: Calculator
Added: SolarSystemPopulationManager implementation
Added: some constants
Added: SolarSystemPopulation comparator
Added: ParticipantManager.startParticipating
Added: EnumDestructionType.merged
Added: SolarSystemPopulationManagerImpl#merge
Updated: made GalaxyManagerImpl.calculate* static
Moved: calculations from GalaxyManagerImpl to Calculator
Added: calculateAvgGap to Calculator
Added: implementation for spinoff and resettle (including tests)