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.

1990/baruch/README.md

@@ -0,0 +1,74 @@
+Best Small Program:
+
+	Doron Osovlanski
+	CADTECH - CAD/CAM Systems Ltd
+        24 Ben-Yosef st.
+        Givat-Shmuel   51905
+	Israel
+
+	Baruch Nissenbaum
+	Tel-Aviv University
+	The Faculty of Engineering
+	Tel-Aviv
+	Israel
+
+
+Judges' comments:
+
+    Compile.  Try:
+
+	echo 4 | baruch
+	echo 7 | baruch
+
+    This program reads an integer between 4 and 99 from the stdin.
+
+    NOTE: The original program did not have a newline at the end of
+	  the file.  We added a final newline to the file to make
+	  unpacking easy.
+
+
+Selected notes from the author:
+
+    The goal of this work was to write a program that solves the
+    classic n-queen problem, with a board size of up to 99x99, while
+    keeping the program as short as possible.
+
+    The program finds all possibilities to place N chess queens on
+    a NxN chess board so that no queen is in range of any other queen
+    (not in the same column row or diagonal).  For each solution the
+    chess board and the place of the queens is printed to stdout.
+
+
+    This program is about as simple and as readable as possible.
+    To make things even more simple we used a very limited subset of C:
+
+	     No pre-processor statements
+	     Only one, harmless, 'for' statement
+	     No ifs
+	     No breaks
+	     No cases
+	     No functions
+	     No gotos
+	     No structures
+
+    In short, it contains no C language that might confuse the
+    innocent reader.  :-)
+
+
+    This program demonstrates the claim that in C, any program
+    can be written using a single 'for' statement, as long as it is
+    long enough..
+
+The authors further note:
+
+    For PC users:
+    In order to compile the program under Turbo-C or MSC, 'int '
+    should be inserted at the beginning of the program.
+    For better looking results it is recommended to replace the " #Q"
+    string with " \261\2".
+
+Copyright (c) 1990, Landon Curt Noll & Larry Bassel.
+All Rights Reserved.  Permission for personal, educational or non-profit use is
+granted provided this this copyright and notice are included in its entirety
+and remains unaltered.  All other uses must receive prior permission in writing
+from both Landon Curt Noll and Larry Bassel.