Simplified finding 'StartingRoom' position handling
Simplified finding 'StartingRoom' position handling

Replaced _game_map dictionary with pos tuple to store 'StartingRoom' position. 
Replaced associated code which handles assigning values to _game_map with if statement to store position of 'StartingRoom' into pos when the tile_name is encountered during parsing of the map.
Removed redundant function that handles assigning of position.
phillipjohnson/text-adventure-tut,ewbvm/securitygame,dalrrard/text-adventure-tut,sammyboy45467/Adventure