Change 'To run' to 'To use' in all README.md files

As in:

    sgit -e 's/# To run/# To use/g' '*README.md'

This makes consistent the message for how to use the program. 'How to
use' was chosen because one can run a program just by doing './foo' but
that doesn't imply that's how to use it but the purpose of the section
is how to use it.

2001/anonymous/README.md

@@ -11,7 +11,7 @@ make
 ```
 
 
-## To run:
+## To use:
 
 ```sh
 ./anonymous x86_program

2001/bellard/README.md

@@ -11,7 +11,7 @@ make
 ```
 
 
-## To run:
+## To use:
 
 ```sh
 ./bellard file

2001/cheong/README.md

@@ -12,7 +12,7 @@ make
 ```
 
 
-## To run:
+## To use:
 
 ```sh
 ./cheong digits

2001/coupard/README.md

@@ -15,7 +15,7 @@ make
 ```
 
 
-## To run:
+## To use:
 
 ```sh
 ./coupard

2001/ctk/README.md

@@ -13,7 +13,7 @@ make
 ```
 
 
-## To run:
+## To use:
 
 ```sh
 ./ctk

2001/dgbeards/README.md

@@ -11,7 +11,7 @@ make
 ```
 
 
-## To run:
+## To use:
 
 ```sh
 ./dgbeards

2001/herrmann1/README.md

@@ -10,7 +10,7 @@ Germany\
 make
 ```
 
-## To run:
+## To use:
 
 ```sh
     ./herrmann1.sh 'prg=file'

2001/herrmann2/README.md

@@ -12,7 +12,7 @@ make
 ```
 
 
-## To run:
+## To use:
 
 ```sh
 ./herrmann2

2001/jason/README.md

@@ -12,7 +12,7 @@ US
 make
 ```
 
-## To run:
+## To use:
 
 ```sh
 ./jason

2001/kev/README.md

@@ -13,7 +13,7 @@ make
 ```
 
 
-## To run:
+## To use:
 
 ```sh
 ./kev # in one terminal

2001/ollinger/README.md

@@ -10,7 +10,7 @@ France
 make
 ```
 
-## To run:
+## To use:
 
 ```sh
 ./ollinger integer

2001/rosten/README.md

@@ -10,7 +10,7 @@ UK\
 make
 ```
 
-## To run:
+## To use:
 
 ```sh
 ./rosten [number]

2001/schweikh/README.md

@@ -10,7 +10,7 @@ Germany\
 make
 ```
 
-## To run:
+## To use:
 
 ```sh
 ./schweikh string string2

2001/westley/README.md

@@ -12,7 +12,7 @@ make
 ```
 
 
-## To run:
+## To use:
 
 ```sh
 ./westley

2001/williams/README.md

@@ -9,7 +9,7 @@ US
 make
 ```
 
-## To run:
+## To use:
 
 ```sh
 ./williams