Made console object static to avoid mult-threading issue with store
application model.
Added the copying of defaults.nh to local directory.
Use set/longjmp to handle saving game (exiting game engine) and
exiting the worker thread used to host the game engine.
Modifid CellAttribute to support maintaining WindowAttribute and
WindowColor.
Switched to using code page 437 to generate glyph texture map.
Added properly supporting colors.