Fix NRE in DebugBits
Add a place in engine to grab Sandbox.Game.dll for reflection access
EngineGlue to load json from jsonasset
Create Sandbox.Utility.JsonAsset for loading JsonAssets
Add game assembly to tool's GAM
Use EngineLoop.GameAssembly in LoadEngineEntities()
Add Asset.TryLoadObject (I don't love this)
Add PropertySheet for asset type to inspector (not saving or anything right now)