Added function to determine StartingRoom position
Added function to determine StartingRoom position

_game_map dictionary which has coordinates as keys and room names as values, as read from map.txt. 
The return_start_coordinates() function searches the new dictionary for the coordinates of StartingRoom and returns the coordinates.
ewbvm/securitygame,phillipjohnson/text-adventure-tut,dalrrard/text-adventure-tut,sammyboy45467/Adventure