Changes to gameObject, Renderer, Engine
Merge branch 'master' of https://github.com/idoychinov/BattleField1

Conflicts:
	BattleField/BaseGameEngine.cs
	BattleField/DestroyedField.cs
	BattleField/IGameField.cs
	BattleField/IRenderer.cs
	BattleField/Mine.cs
Fix after merge