auto-zooming camera, healing box, multiple maps

Added auto-zooming camera, which helps keep the players visible at all times but it sometimes can be buggy, so I also added a feature of disabling it. To disable it, just go to the Options menu, where you can just click the toggle button. 

Also there are 2 maps now, from which you can chose before starting the game under the Select Map menu

I also added healing boxes, which spawn like weaponboxes, and heal the players hp that picks it up by 50% 

It is now possible to go back to the menu view from the game view