added a start to contributing tips and a link in the readme

Author: brntbeer

CONTRIBUTING.MD

@@ -0,0 +1,4 @@
+# Some Helpful Contributing Tips
+1. New lessons should be created as issues on this repo. The title should indicate the date the lesson is for.
+
+2. The lessons themselves should exist as their own repo or fork under the org.

README.md

@@ -7,7 +7,8 @@ list. This is also a great place to find out how you can help the [CoderDojo](ht
 There's excellent information at <http://coderdojo.com/> about starting a dojo and getting
 involved. If you'd like to help out our specific dojo, it would be great to [file an issue](https://github.com/CoderDojoSF/Lesson-Plans/issues/new)
 and introduce yourself and communicate with us about our next session, signing up and attending
-frequently, or contributing back to our repos.
+frequently, or contributing back to our repos. Also take a look at (CONTRIBUTING.MD)(https://github.com/CoderDojoSF/Lesson-Plans/blob/master/CONTRIBUTING.md)
+for more tips.
 
 ## How you can get started creating a lesson
 Many of our projects are great examples of how we start lessons. For more information,