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.

1990/baruch/README.md

@@ -16,7 +16,7 @@
 
         make all
 
-### To run:
+## To run:
 
 	echo 4 | ./baruch
 	echo 7 | ./baruch

1990/cmills/README.md

@@ -10,7 +10,7 @@
 
 	make all
 
-### To run
+## To run
 
     ./cmills [starting_cash]
 
@@ -30,7 +30,7 @@ to:
     !gets(l)
 
 
-### Try:
+## Try:
 
     ./cmills 5000
 

1990/dds/README.md

@@ -19,12 +19,12 @@ prototype to `fopen()` and made this use `fgets()` instead of `gets()` to make
 it safer. He also fixed a segfault in the case that the file cannot be loaded.
 Thank you Cody for your assistance!
 
-### To run
+## To run
 
 	./dds
 
 
-### Try:
+## Try:
 
 Give the following lines as input:
     

1990/jaw/README.md

@@ -36,7 +36,7 @@ Endoh](/winners.html#Yusuke_Endoh). Thank you Yusuke for your implementation of
 `btoa`!
 
 
-### Try:
+## Try:
 
 To test the official C entry, one might try:
 

1990/scjones/README.md

@@ -27,7 +27,7 @@ you Yusuke!
 compiler option `-trigraphs` would also have worked.
 
 
-### To run:
+## To run:
 
 	./scjones
 

1990/stig/README.md

@@ -9,7 +9,7 @@
 
         make all
 
-### To run
+## To run
 
 	make all