What is new?

• Added  network multiplayer. I tested with LAN. It is framework that handles the network and it should work in other ways like with hamachi or with public IP if you know hot to configure it. Let me know if you come to some issues.
• Added sandbox mode where you can do anything you want. Create any map you like or familiarize yourself to game mechanics. 

Other changes and fixes

• Improved AI. AI code cleaned up.
• Now you can see that AI used meteor.
• Fixed bug where sometimes the fourth player is not added.
• Added fear of new bugs because of code refactor that adds network multiplayer.