adding instructions for developing using cloud9 ide to the readme

README.md

@@ -15,3 +15,14 @@
 3. for more information on jekyll  http://jekyllrb.com/docs/home/
 
 More info: https://help.github.com/articles/using-jekyll-with-pages
+
+# Development using Cloud9 (http://c9.io)
+
+1. Fork https://github.com/iron-io/docs to your github account
+2. Login (or signup) at http://c9.io using github
+3. Click on 'docs' under 'PROJECTS ON GITHUB' in the left menu
+4. Click the green 'CLONE TO EDIT' button
+5. In the terminal use the command: jekyll serve --watch --port $PORT
+
+When you are done making your awesome edits, git commit && git push, then go back to github and do a pull request.  
+Easy as pie and you never even had to leave your browser!