Changed unnecessarily gendered word

These things might feel small, if `should look like it was written by one **man**` reads bad for me, I can only imagine how it reads for anyone in open source that does not identify as one.

CONTRIBUTING.md

@@ -5,7 +5,7 @@ Follow simple rules:
 - Not violate [DRY](http://programmer.97things.oreilly.com/wiki/index.php/Don%27t_Repeat_Yourself).
 - [Boy Scout Rule](http://programmer.97things.oreilly.com/wiki/index.php/The_Boy_Scout_Rule) needs to have been applied.
 
-1. Your code should look like all the other code - this project should look like it was written by one man, always.
+1. Your code should look like all the other code - this project should look like it was written by one person, always.
 2. If you want to propose something - just create an issue and describe your question with as much description as you can.
 3. Please never send issues or pull requests about code style, jshint violations etc - I do not accept it (and you will spend your time for free).
 4. If you think you have some general improvement, consider creating a pull request with it.