Re-add the Wyrmfire snow graphics and all Mistb0rn graphics not based on BoA or Exile I-III.

- Also update the map graphics to reflect the scrubbing

rsrc/graphics.exd/mac/CREDITS.md

@@ -59,8 +59,18 @@ Some sheets are entirely original:
 
 For terrain graphics, most are original BoE graphics, except for the following:
 
-- On ter5.png, graphics 20-23 and 33 are by Mistb0rn. Graphic 25 is by ADoS.
-- termap.png is currently out-of-date.
+- On ter5.png, graphics 20-23 and 33 are by Mistb0rn. Graphics 18, 19, 25 are by ADoS.
+Graphics 24 and 46-49 were monster graphics in original BoE.
+- ter6.png is entirely by Mistb0rn.
+- ter7.png is by Mistb0rn, except the small trees (54 and 46) which are by Celtic Minstrel.
+- On ter8.png, graphics 0, 1, 5, 6, 10, 11, 15, 16 are by Celtic Minstrel; 48 and 49 are by
+Wyrmfire; and the rest are by Mistb0rn.
+- ter9.png is entirely by Wyrmfire.
+- On ter10.png, graphics 0-5, 8-19 are by Wyrmfire, and the rest are by Mistb0rn (but based
+on Wyrmfire's graphics).
+- On ter11.png, graphics 0-22 are by Mistb0rn.
+- On teranim.png, graphic 15 is by Mistb0rn and graphic 16 is by Wyrmfire.
+- termap.png currently just contains directly shrunken versions of the other sheets.
 
 For monster graphics, most are original BoE graphics, except for the following: