Merge two constructors of Game to avoid another Pi:GetGalaxy reference.
Pass galaxy to StarSystem::Unserialize.
Give Game a m_galaxy member.
GalacticView, SectorView, SystemView, SystemInfoView and WorldView no longer use global Galaxy object.
Polit no longer accesses global Galaxy.
Make sure a GalaxyObjectCache is empty when it is destroyed.
Use explicitly passed galaxy for dumping.
StarSystem-related functions no longer use global Galaxy object.
Replace remaining references of Pi::GetGalaxy by Pi::game->GetGalaxy.
Completely move Galaxy object to Game.
Delay checking system path until we have a Galaxy.