Add basic player movement

game now runs in game loop

w a s d moves player to expected space, if it is empty (IFF the
direction has '.' character, makes this a 'p' and previous player
location a '.')
- done through adding to map.h private ints playerLocRow, playerLocCol:
these variables should be always be updated with the coordinates of the
player's location in the map

enter 'q' to exit program easily when debugging