git mv *.hint -> README.md

There is one exception:

    $ find . -name '*.hint' -execdir git mv '{}' README.md \;
    git statufatal: destination exists, source=1992/albert/albert.hint, destination=1992/albert/README.md

Looking at the two files they differ quite a bit so I've not changed it.
I'll bring this up on GitHub.

2004/arachnid/README.md

@@ -0,0 +1,54 @@
+Best use of Vision:
+
+    Nick Johnson
+    25 Harvey Tce
+    Richmond
+    Christchurch
+    New Zealand
+
+    http://www.notdot.net/
+
+
+Judges' Comments:
+
+    To build:
+
+	make arachnid
+
+    Try:
+
+	./arachnid
+	./arachnid arachnid.info
+
+    The fun part comes when you realize that the maze scrolls.  The overall
+    visual effect is quite pleasing (at least on some displays), and, well,
+    it's a lot of fun.
+
+    Navigation is through the use of the "wasd" inverted-T formation on
+    Qwerty keyboards.  Rogue players, vi users, and Dvorak typists are
+    invited to get lost!
+
+
+Selected Author's Comments:
+
+    This program accepts ASCII formatted mazes as input, and renders
+    them onscreen for the user to explore, complete with Line Of Sight
+    - you cannot see parts of the maze your avatar (the '@') could not
+    have seen.
+
+    The maze files will be interpreted with spaces ' ' as gaps, tilde
+    '~' symbols (if any) as exits (which get represented as a NetHack
+    style '<' once loaded), and any other characters as walls.
+
+    Feed the program its own source for a default maze. Running it with
+    no command line parameters will do this. In a nice symmetry, the 
+    character constant '~' that recognises exits to input mazes itself 
+    forms the exit to the default maze. Another maze, 'maze1' has also 
+    been provided. This maze is 255x255, about the largest maze supported, 
+    for the particularaly insane maze explorers out there.
+
+    Usage:
+    	./prog.c [mazefile]
+
+    You can explore the maze using the w,a,s, and d keys.
+