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.

1995/cdua/README.md

@@ -0,0 +1,27 @@
+Best Output:
+
+    Carlos Duarte
+    Instituto Superior Tecnico
+    Largo da Igreja, 5 R/C DTo
+    Damaia
+    2720 Amadora 
+    Portugal
+
+
+Judges' comments:
+
+    To use:
+	make cdua
+
+    Try: 
+	cdua
+
+    This could be used as the basis of an a-maze-ing screen exerciser.
+
+
+Selected notes from the author:
+
+   A program that generates a maze, and then solves it, all this being
+   seen by the user.  Some highlights of obfuscation are: 3 steps
+   functions in one - main(), several recursive calls with conditional
+   actions, and just one (big and ugly) statement to solve the maze.