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.

2019/adamovsky/README.md

@@ -2,19 +2,19 @@
 
     Ondřej Adamovský <oa@cmail.cz>  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog file.unl
 ```
 
-### Try:
+## Try:
 
 ```sh
 ./prog spam.unl

2019/burton/README.md

@@ -2,19 +2,19 @@
 
     Dave Burton  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog < prog.c
 ```
 
-### Try:
+## Try:
 
 ```sh
 echo "Do or do not. There is no try."

2019/ciura/README.md

@@ -3,19 +3,19 @@
     Marcin Ciura  
     Twitter: @mciura  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./getwords.sh en | grep .. | ./prog string
 ```
 
-### Try:
+## Try:
 
 ```sh
 ./getwords.sh en | grep .. | ./prog aeiouvwxyz

2019/diels-grabsch1/README.md

@@ -3,19 +3,19 @@
     Volker Diels-Grabsch  
     <https://njh.eu>  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog < file > file.Z
 ```
 
-### Try:
+## Try:
 
 ```sh
 dd bs=1024 count=2048 < /dev/zero | compress > ref.Z

2019/diels-grabsch2/README.md

@@ -3,19 +3,19 @@
     Volker Diels-Grabsch  
     <https://njh.eu>  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog
 ```
 
-### Try:
+## Try:
 
 ```sh
 sha512sum prog.c || shasum -a 512 prog.c

2019/dogon/README.md

@@ -2,19 +2,19 @@
 
     Gil Dogon  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog < pattern.mc
 ```
 
-### Try:
+## Try:
 
 ```sh
 ./prog < glider.mc

2019/duble/README.md

@@ -4,19 +4,19 @@
     <https://lig-membres.imag.fr/duble>  
     Twitter: @etienne_duble  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog file
 ```
 
-### Try:
+## Try:
 
 ```sh
 ./prog /tmp/drawing

2019/endoh/README.md

@@ -3,19 +3,19 @@
     Yusuke Endoh  
     Twitter: @mametter  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog
 ```
 
-### Try:
+## Try:
 
 ```sh
 gdb ./prog || llvm ./prog

2019/giles/README.md

@@ -2,19 +2,19 @@
 
     Edward Giles  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog infile.wav outfile.wav
 ```
 
-### Try:
+## Try:
 
 ```sh
 play MonodyVocals.wav

2019/karns/README.md

@@ -3,19 +3,19 @@
     Joshua Karns  
     Twitter: @jkarnss  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog < textfile_that_fits_on_the_screen
 ```
 
-### Try:
+## Try:
 
 ```sh
 ./prog < README.md

2019/lynn/README.md

@@ -4,19 +4,19 @@
     <https://crypto.stanford.edu/~blynn/>
     Twitter: @bmxlynn
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog
 ```
 
-### Try:
+## Try:
 
 ```sh
 (./prog < fib.hs; cat prog.c) > fib.c

2019/mills/README.md

@@ -3,13 +3,13 @@
     Christopher Mills  
     Twitter: @MisterXopher  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 make cpclean
@@ -18,7 +18,7 @@ make cpclean
 ./prog < $(< ls -1tr cp* | tail -1) | head -100
 ```
 
-### Try:
+## Try:
 
 ```sh
 make test-64bit

2019/poikola/README.md

@@ -4,13 +4,13 @@
     <https://ig.fi/other/ioccc>  
     Twitter: @timpoiko  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog 512 ./prog
@@ -22,7 +22,7 @@ sleep 86400; make clobber prog
 ./prog 512 ./prog
 ```
 
-### Try:
+## Try:
 
 If you don't have a few days, try:
 

2019/yang/README.md

@@ -3,13 +3,13 @@
     Don Yang  
     <http://uguu.org/>  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog sample_input.txt a b c d
@@ -25,7 +25,7 @@ cat d
 cat a b c d | ./prog
 ```
 
-### Try:
+## Try:
 
 ```sh
 ./prog prog.c a b c d e