NEW - tile images + additional changes

- A couple of new tileMap images to choose from.
- Images can now be png24 file types, allowing for transparency

- Some changes to tileMap (attempts at drawing circles) that should
actually be taken out later

- Temporary modifications to tile map sizes and player rendering
positions.

- mapFile.txt has been renamed, just so that the tilemap automatically
generates and fills in all the expected tiles. (if you load a file, the
map will only create what is in the map file)

- zoom changed back to smooth scrolling