modified ai fighter retreat so that the code is actually called.  Difficulty testing due to what I believe to be click artifacts.  Will be implementing "pauses" to the code to see if that helps.
Added pause method.  Implemented to pause before AI takes turn.  Makes the game flow better and should help with code executing too soon.
Cleaned up some TODO items.

Added fighters to garbage collection

Removed fighters from being added to starting list

Added Reset() method that rebuilds the grid and resets the variables.