Mass fixes to headers in README.md files

There were many many README.md files with the wrong heading level for
different sections. These have been changed.

To help go through the changes it should be noted I used sgit and also
here is what is changed:

The 'Try', 'To build' and 'To run' lines have two '#'s. Some had one and
others had three.

An exception is that in 1984/anonymous/README.md for the alternative
code that had three '#'s. This is not consistent yet and it might be
that only two are desired. But for now that one at least has three.

1996/eldby/README.md

@@ -10,7 +10,7 @@
 
         make all
 
-### To run
+## To run
 
 	./eldby 
 

1996/gandalf/README.md

@@ -19,7 +19,7 @@ and work with modern systems. As he loved the references in the code that could
 not compile he just commented out as little as possible to get this to compile.
 Thank you Cody for your assistance!
 
-### To run
+## To run
 
 	./gandalf
 

1996/huffman/README.md

@@ -12,7 +12,7 @@
 
         make all
 
-### To run:
+## To run:
 
 
 	echo 'Huffman Decoding' | ./huffman

1996/jonth/README.md

@@ -12,7 +12,7 @@
 
         make all
 
-### To run:
+## To run:
 
 	./jonth
 

1996/rcm/README.md

@@ -9,7 +9,7 @@
 
         make all
 
-### To run:
+## To run:
 
 	./rcm < rfc1951.gz