I'm rewrite all code in prototype style. All objects have own prototype.
Realized centring map in Scene.
Added function to load mask of map for drawing saved maps.
Added functions to check collision tank with edges of map.
TODO:
1. First I need to create map editor to edit and create own maps.
2. Add check collision on blocks (steel and brick)
3. Add check for current position tank for change speed (on forest or water)