Changelog for MegaZeux 2.51

2.51 release: (quick bug-fix release while working on 3.00)

 * NOTE: I HAVE decided to release a 3.00 version of MegaZeux using
	PROTECTED MODE and a large number of enhancements. Visit the Software
	Visions web site for details. Betas will be PUBLIC.

 * Bug where moving north or west towards a board that is larger than 100
	tiles in a dimension may not work properly fixed.
 * Bugs in 2GDM.EXE preventing proper conversion of some S3Ms fixed.
 * A rare bug preventing internal MOD conversion fixed.
 * "Error opening MOD" will no longer appear during normal gameplay.
 * Exporting ANSis now adds a color to the end returning text to normal
	grey. (so TYPEing them in DOS no longer screws up the DOS colors)