Added transit and made slight changes to map

Few things:
1. Added transit. I need to edit this more to account for other objects
in map
2. Changed Map class so that 0’s are just blanks. I got a headache
looking at the map. Also, all tiles traveled on by tav is denoted with
a ‘C’.
      - Maybe not a good idea for ‘transit’?
3. Need to create a reference so that bottom left corner of map is
(0,0) instead of (0,9).
       - I keep getting confused. It would make the rest of the
programming easier i think