Update README.md

Author: Tim L. White

README.md

@@ -21,4 +21,11 @@ You can purchase a module containing copyrighted Goodman Games content ready for
 * Connor Stone (@ckwk)
 * @adotor
 
+###### Contributing
+* Thanks for considering helping out!
+* All PRs must mass the automated unit tests in this project to be considered for merging.
+* All PRs must implement Internationalization support in en.json to be considered for merging.
+* We have lots of changes in progress, so don't be sad if we don't merge your PR because we have conflicting changes already in progress.
+* Chat with us on the Discord channel if you have questions!
+
 _Based on material ©2012 Goodman Games, used with permission._