TL_Class(char *name)

*name - the name of a map file to load.  NOTE: If using this constructor, do not call unless allegro_init() has already been called!

One of 2 constructors: This one takes the name of a map file to initially
load.  VERY VERY SUPER HUGE IMPORTANT NOTE: When using this constructor,
due to the Allegro functions it uses, you must NOT, I REPEAT, must NOT
call this constructor until you've initialized Allegro.

TL_Class(void)

This is the 2nd constructor.  It just sets up a blank TL_Class object
with no map file loaded. You do NOT need to have Allegro initialized
before calling this, unlike with the constructor above.  But later
you must load a map file if you are to do anything useful with it.
See the loadMap function later on.