Contributors.

Author: thebracket

book/src/contributors.md

@@ -48,6 +48,7 @@ The following people have contributed to this project:
 * [mdtro](https://github.com/mdtro) found a problem with the Chapter 7 code.
 * [pprobst](https://github.com/pprobst) noticed that tool-tips were revealing hidden monsters.
 * [Ben Doerr](https://github.com/bendoerr) reminded me to remind you to run the new systems created in chapter 7.
+* [Charlie Hornsby](https://github.com/chornsby) helped with some text/code inconsistencies in chapter 1.
 
 ## Supporters