New map Biomes and states.

1. The map state is saved (to memory, not disk).
   1. The robot position is saved.
   2. The entities that you find on each sector is saved.
   3. The actions that you apply to the entities you find are also saved. So if you go back to a sector where you activated actions, you will see that you cannot activate the same action again on the same entities than before.
      1. In the future I plan to reset the entities to their original state after a few days have passed.
2. The map is made of sectors that contain biomes.
   1. You can recognize each biome by its unique tile graphic, that way you can also remember what is inside.
      1. If you need to find a specific entity type, remember how the tile looks, you'll find the same type of entities in other tiles that look the same.
   2. Each biome holds different entity species.
   3. Each biome has its color, and each planet has its own characteristic color.
3. Entity species have unique colors now, so they are easier to recognize when you encounter them.
4. Added a few new map biome sprites. 

The game is more playable than before, so please try it and let me know what you think!.