TheGreatEscape.ctl: Correct all of the character constants.

There are :-

 1x Commandant
14x Guards
 4x Guard dogs
 6x Prisoners
 2x Stoves
 1x Crate

This allows me to give the following three elements more accurate names:

* tenlong -> prisoners_and_guards
* set_location_A35F -> set_prisoners_and_guards_location
* set_location_A373 -> set_prisoners_and_guards_location_B
Change routines which refer to the 'player' to refer to the 'hero' instead.

Reasoning: The game's hero is controlled by the player. The player does not sit, or sleep, but the hero does. Distinguish between the two.