Undo apparent accidental @-color replaces in upstream TBA files. (#62)

I am guessing some script or tool used upstream is doing an unsafe
search-and-replace for '@' with TAB, and accidentally changing these.
They seem to have been creeping into the repo for years.

I produced this fix commit automatically with:
  sed -i 's|\t\([bcdgmnoruwyBCDGMRWY]\)|@\1|g' tba/*/*.*
...and then a few files' changes had to be undone.

I looked through all of the rest, and they look like correct fixes.

I also ran all the other letters, and they only make incorrect "fixes".

lib/world/wld/654.wld

@@ -21,29 +21,29 @@ D3
 0 0 65397
 E
 map plan~
-	c21 23 25 27 29 31 33 35 37 39	n
-	n|  |  |  |  |  |  |  |  |  |
-	g20 22 24 26 28 30 32 34 36 38	n
-	n|  |  |  |  |  |  |  |  |  |
-	y00	n-	y01	n-	y02	n-	y03	n-	y04	n-	y05	n-	y06	n-	y07	n-	y08	n-	y09	n
-	n      |              |      
-	c61	n-	g60	n-	y92	n-	g62	n-	c63 	c77	n-	g76	n-	y96	n-	g78	n-	c79	n
-	n      |              |      
-	c65	n-	g64	n-	y93	n-	g66	n-	c67 	c81	n-	g80	n-	y97	n-	g82	n-	c83	n
-	n      |              |      
-	c69	n-	g68	n-	y94	n-	g70	n-	c71 	c85	n-	g84	n-	y98	n-	g86	n-	c87	n
-	n      |              |      
-	c73	n-	g72	n-	y95	n-	g74	n-	c75 	c89	n-	g88	n-	y99	n-	g90	n-	c91	n
-	n      |              |      
-	y10	n-	y11	n-	y12	n-	y13	n-	y14	n-	y15	n-	y16	n-	y17	n-	y18	n-	y19	n
-	n|  |  |  |  |  |  |  |  |  |
-	g40 42 44 46 48 50 52 54 56 58	n
-	n|  |  |  |  |  |  |  |  |  |
-	c41 43 45 47 49 51 53 55 57 59	n
+@c21 23 25 27 29 31 33 35 37 39@n
+@n|  |  |  |  |  |  |  |  |  |
+@g20 22 24 26 28 30 32 34 36 38@n
+@n|  |  |  |  |  |  |  |  |  |
+@y00@n-@y01@n-@y02@n-@y03@n-@y04@n-@y05@n-@y06@n-@y07@n-@y08@n-@y09@n
+@n      |              |      
+@c61@n-@g60@n-@y92@n-@g62@n-@c63 @c77@n-@g76@n-@y96@n-@g78@n-@c79@n
+@n      |              |      
+@c65@n-@g64@n-@y93@n-@g66@n-@c67 @c81@n-@g80@n-@y97@n-@g82@n-@c83@n
+@n      |              |      
+@c69@n-@g68@n-@y94@n-@g70@n-@c71 @c85@n-@g84@n-@y98@n-@g86@n-@c87@n
+@n      |              |      
+@c73@n-@g72@n-@y95@n-@g74@n-@c75 @c89@n-@g88@n-@y99@n-@g90@n-@c91@n
+@n      |              |      
+@y10@n-@y11@n-@y12@n-@y13@n-@y14@n-@y15@n-@y16@n-@y17@n-@y18@n-@y19@n
+@n|  |  |  |  |  |  |  |  |  |
+@g40 42 44 46 48 50 52 54 56 58@n
+@n|  |  |  |  |  |  |  |  |  |
+@c41 43 45 47 49 51 53 55 57 59@n
  
-	yRoads
-	gAtria
-	cHouses
+@yRoads
+@gAtria
+@cHouses
 ~
 S
 #65401