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.

2015/burton/README.md

@@ -3,7 +3,7 @@
     Dave Burton <ioccc@snox.net>
     <http://snox.net/ioccc>
 
-# To build:
+## To build:
 
 ```sh
 make

2015/dogon/README.md

@@ -3,19 +3,19 @@
     Gil Dogon  
     <http://sokoban-gild.com>  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog
 ```
 
-### Try:
+## Try:
 
 ```sh
 ./prog

2015/duble/README.md

@@ -3,7 +3,7 @@
     Etienne Duble <etienne.duble@imag.fr>  
     <http://lig-membres.imag.fr/duble>  
 
-# To build:
+## To build:
 
 ```sh
 make

2015/endoh1/README.md

@@ -7,13 +7,13 @@
     Someone Anonymous  
     Twitter: @hirekoke  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog
@@ -26,7 +26,7 @@ but in 2023 [Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) did this
 and reported that it works well. He also said he really loved it! Thank you
 Cody!
 
-### Try:
+## Try:
 
 ```sh
 echo "Do or do not. There is no try."

2015/endoh2/README.md

@@ -4,19 +4,19 @@
     <https://github.com/mame/>  
     Twitter: @mametter  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog
 ```
 
-### Try:
+## Try:
 
 ```sh
 cat prog.c

2015/endoh3/README.md

@@ -4,19 +4,19 @@
     <https://github.com/mame/>  
     Twitter: @mametter  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog
 ```
 
-### Try:
+## Try:
 
 ```sh
 cc -o koch koch.c prog.c

2015/endoh4/README.md

@@ -4,7 +4,7 @@ Yusuke Endoh
 <https://github.com/mame/>  
 Twitter: @mametter  
 
-# To build:
+## To build:
 
 ```sh
 make

2015/hou/README.md

@@ -3,19 +3,19 @@
     Qiming Hou <hqm03ster@gmail.com>  
     <http://www.houqiming.net/>  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 echo IOCCC | ./prog
 ```
 
-### Try:
+## Try:
 
 ```sh
 echo "" | ./prog

2015/howe/README.md

@@ -5,13 +5,13 @@ Montreal, Quebec, Canada
 <http://www.snert.com/>  
 Twitter: @SirWumpus  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog file1 file2
@@ -19,7 +19,7 @@ make
 ./prog -d file1 file2
 ```
 
-### Try:
+## Try:
 
 ```sh
 ./prog prog.alt.c prog.c

2015/mills1/README.md

@@ -3,19 +3,19 @@
 Chris Mills  
 Twitter: @MisterXopher  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog
 ```
 
-### Try:
+## Try:
 
 ```sh
 ./prog

2015/mills2/README.md

@@ -3,19 +3,19 @@
     Chris Mills  
     Twitter: @MisterXopher  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog compressed_file.Z
 ```
 
-### Try:
+## Try:
 
 ```sh
 printf '000I\236\f\31H\260\240\301\203' > ioccc.Z

2015/muth/README.md

@@ -3,19 +3,19 @@
     Dominik Muth 
     <muth.ioccc@freenet.de>  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 make -B [MACHINE=your_machine.h] [TAPE=your_tape.h] [X=[0|1|2|3|4|5|6|7|8|9]] [V=[0|1|2]] run
 ```
 
-### Try:
+## Try:
 
 ```sh
 make -B V=2 run

2015/schweikhardt/README.md

@@ -3,13 +3,13 @@
     Jens Schweikhardt  
     <http://www.schweikhardt.net>  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./prog n
@@ -17,7 +17,7 @@ make
 
 where n is a base 16 number of any size.
 
-### Try:
+## Try:
 
 ```sh
 ./prog 19

2015/yang/README.md

@@ -3,19 +3,19 @@
     Don Yang  
     <http://uguu.org/>  
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 echo Some text | ./prog 
 ```
 
-### Try:
+## Try:
 
 ```sh
 echo IOCCC 2015 | ./prog | tee output.c