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.

2000/thadgavin/README.md

@@ -0,0 +1,70 @@
+Most Portable Output:
+
+    Thaddaeus Frogley
+    Creature Labs
+    164 Hornbeams,
+    Harlow, Essex,
+    UK
+
+    Gavin Buttimore
+    Creature Labs
+    9 Elizabeth Way,
+    Cambridge,
+    UK, CB4 1DE
+
+
+Judges' Comments:
+
+    To build:
+
+	make thadgavin
+
+    To run:
+
+	./thadgavin
+
+    This entry is a nice play by the rules. It can use curses, if the
+    SDL graphic library is not present, and is quite good at that,
+    but the colors used in graphic mode (16 bit depth) are unfortunately
+    less than dazzling. We could not test this entry in DOS mode.
+
+
+Selected Author's Comments:
+
+    To run under DOS:
+
+        Compile using DJGPP as follows:
+
+        gcc thadgavin.c -o thadgavin.exe -Wall -lm -O6 -mpentium -fomit-frame-pointer
+-ffast-math
+
+    To run under Windows, X-Windows or MacOS using the
+    Simple DirectMedia Layer:
+
+        For example:
+
+        gcc -O6 -lpthread -g -o thadgavin thadgavin.c -lSDL -DSDL -lm
+
+
+    In gcc you may get the following warning:
+
+	prog.c:46: warning: passing arg 2 of `SDL_SetColors' from incompatible
+	pointer type
+
+    In Microsoft Visual Studio you may get warnings as follows:
+
+	prog.c(46) : warning C4133: 'function' : incompatible types - from 'unsigned
+	char *' to 'struct SDL_Color *'
+	prog.c(63) : warning C4026: function declared with formal parameter list
+	prog.c(77) : warning C4244: '=' : conversion from 'double ' to 'unsigned
+	char ', possible loss of data
+
+
+    But don't worry, this is completely normal.
+
+    Recommended dosage:
+
+	At least 3 minutes taken 3 times a day when tired.
+
+	Do not exceed 3 times recommended dose.  May cause
+	sickness, dizziness, nausea.