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.

2006/birken/README.md

@@ -12,7 +12,7 @@ make
 ```
 
 
-## To run:
+## To use:
 
 ```sh
 ./birken < file.tofu

2006/borsanyi/README.md

@@ -12,7 +12,7 @@ make
 ```
 
 
-## To run:
+## To use:
 
 ```sh
 ./borsanyi string > file.gif

2006/grothe/README.md

@@ -9,7 +9,7 @@ US
 make
 ```
 
-## To run:
+## To use:
 
 ```sh
 ./grothe carrier_freq pixelclock horizontal_total < some_input.txt

2006/hamre/README.md

@@ -9,7 +9,7 @@ Norway
 make
 ```
 
-## To run:
+## To use:
 
 ```sh
 ./hamre math_expression_string

2006/meyer/README.md

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

2006/monge/README.md

@@ -14,7 +14,7 @@ make
 ```
 
 
-## To run:
+## To use:
 
 ```sh
 ./monge expression ...

2006/night/README.md

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

2006/sloane/README.md

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

2006/stewart/README.md

@@ -9,7 +9,7 @@ US
 make
 ```
 
-## To run:
+## To use:
 
 ```sh
 ./stewart width_and_height iterations file > file.xbm

2006/sykes1/README.md

@@ -10,7 +10,7 @@ Finland\
 make
 ```
 
-## To run:
+## To use:
 
 ```sh
 ./sykes1

2006/sykes2/README.md

@@ -10,7 +10,7 @@ Finland\
 make
 ```
 
-## To run:
+## To use:
 
 ```sh
 ./sykes2

2006/toledo1/README.md

@@ -11,7 +11,7 @@ Mexico\
 make
 ```
 
-## To run:
+## To use:
 
 ```sh
 ./toledo1 [0-9][0-9]

2006/toledo2/README.md

@@ -13,7 +13,7 @@ make
 ```
 
 
-## To run:
+## To use:
 
 ```sh
 ./toledo2

2006/toledo3/README.md

@@ -13,7 +13,7 @@ make
 ```
 
 
-## To run:
+## To use:
 
 ```sh
 ./toledo3 [1 | 2 | 3 [b]]