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.

2000/anderson/README.md

@@ -16,13 +16,13 @@ make
 use `fgets()` instead of `gets()` to make it safer. Thank you Cody!
 
 
-### To run:
+## To run:
 
 ```sh
 echo something | ./anderson
 ```
 
-### Try:
+## Try:
 
 ```sh
 echo Obfuscate | ./anderson

2000/bellard/README.md

@@ -13,13 +13,13 @@
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./bellard
 ```
 
-### Try:
+## Try:
 
 ```sh
 Do. Or do not. There is no try. :-)

2000/bmeyer/README.md

@@ -7,19 +7,19 @@
     Australia
     http://byron.csse.monash.edu.au/
     
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./bmeyer
 ```
 
-### Try:
+## Try:
 
 In a video window (white text on black background):
 

2000/briddlebane/README.md

@@ -14,13 +14,13 @@ The Xoemn, MN 68214
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./briddlebane
 ```
 
-### Try:
+## Try:
 
 ```sh
 echo "Do or do not. There is no try."

2000/dhyang/README.md

@@ -8,19 +8,19 @@ USA
 
 http://omoikane.cjb.net
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./dhyang
 ```
 
-### Try:
+## Try:
 
 ```sh
 make saitou

2000/dlowe/README.md

@@ -24,13 +24,13 @@ with more recent perl versions; the symbol now `PL_na` was once `na`. He notes
 that this entry crashes under macOS but it works under linux after this change.
 
 
-### To run:
+## To run:
 
 ```sh
 ./dlowe [file ...]
 ```
 
-### Try:
+## Try:
 
 ```sh
 echo "13 14 15 16 17 + - * / p" | ./dlowe

2000/jarijyrki/README.md

@@ -14,7 +14,7 @@
 
 	http://personal.eunet.fi/pp/halo/
 
-# To build:
+## To build:
 
 ```sh
 make
@@ -27,7 +27,7 @@ compile this by adding `X11/` to the includes of `Xlib.h` and `keysym.h`. Thank
 you Cody!
 
 
-### To run:
+## To run:
 
 ```sh
 ./jarijyrki < infile.info > outfile.info
@@ -35,7 +35,7 @@ you Cody!
 
 You will need a system capable of displaying the results of X Window programs.
 
-### Try:
+## Try:
 
 ```sh
 ./jarijyrki < sheet1.info > myedits.info

2000/natori/README.md

@@ -6,7 +6,7 @@ Rigakubu 7-goukan 311
 Hongou 7-3-1, Bunkyou-ku, Tokyo
 Japan
 
-# To build:
+## To build:
 
 ```sh
 make
@@ -18,13 +18,13 @@ when run or not compile at all (gcc and clang respectively). Thank you Cody for
 your assistance!
 
 
-### To run:
+## To run:
 
 ```sh
 ./natori
 ```
 
-### Try:
+## Try:
 
 ```sh
 echo "Do or do not. There is no try."

2000/primenum/README.md

@@ -4,7 +4,7 @@
     [address subject to change]
     MD, USA
 
-# To build:
+## To build:
 
 ```sh
 make
@@ -15,14 +15,14 @@ portable by changing the return type of `main()` to be `int` not `void`. Thank
 you Cody for your assistance!
 
 
-### To run:
+## To run:
 
 ```sh
 ./primenum n 
 ```
 NOTE: n is an integer.
 
-### Try:
+## Try:
 
 ```sh
 ./primenum 23209

2000/rince/README.md

@@ -7,19 +7,19 @@ Cambridge
 CB2 2QH
 England
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./rince number number2
 ```
 
-### Try:
+## Try:
 
 ```sh
 make dmy2jd

2000/robison/README.md

@@ -5,19 +5,19 @@ Arch D. Robison
 Champaign IL 61821
 USA
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./robison
 ```
 
-### Try:
+## Try:
 
 ```sh
 echo "Do or do not. There is no try."

2000/schneiderwent/README.md

@@ -3,19 +3,19 @@
 Craig Schneiderwent
 WI, USA
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./schneiderwent datafile
 ```
 
-### Try:
+## Try:
 
 ```sh
 ./schneiderwent schneiderwent.data

2000/thadgavin/README.md

@@ -12,19 +12,19 @@
     Cambridge,
     UK, CB4 1DE
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./thadgavin
 ```
 
-### Try:
+## Try:
 
 ```sh
 echo "Do or do not. There is no try."

2000/tomx/README.md

@@ -8,19 +8,19 @@ India
 
 http://tomx.tripod.com/
 
-# To build:
+## To build:
 
 ```sh
 make
 ```
 
-### To run:
+## To run:
 
 ```sh
 ./tomx
 ```
 
-### Try:
+## Try:
 
 ```sh
 rm -f ./tomx