Auto-Build Release c436c2bee5

Reorganize namespaces (#320)

* Remove unused usings

* Delete an unused function ChecksExtensions.StillExists

* Sync namespaces with folder structure

* Fix warnings in project file

* Put mod loading in its own class, in preparation for further refactoring

* Remove Mod.Load method, now ModLoader is used

* Eliminate redundant loading of mod which never actually happens, to get rid of the dependency on ModLoader

* Actually we do need to load the mod when loading a savegame

* Fix a few nullability warnings

* Move DoNotAssignIDAttribute out of Galaxy.cs into its own file

* Rename a lot of Galaxy related stuff to Game since it really has more to do with game state than the actual galaxy map.

* Rename Galaxy itself to Game, will want to pull out galaxy specfic code next...

* Split Galaxy back out from Game (finally!)

* We do actually need to load the mod when setting the mod path for the game.