more info

README.md

@@ -3,5 +3,8 @@
 That's what we're trying to build. Please contribute
 by [forking][fk] and sending a [pull request][pr].
 
+For more information on gitignore: [gitignore(5)][g5]
+
 [fk]: http://help.github.com/forking/
 [pr]: http://help.github.com/pull-requests/
+[g5]: http://man.cx/gitignore