Merge pull request #59 from paczian/master

removed message event listener
Merge pull request #60 from paczian/master

minor demo update
Merge pull request #61 from paczian/master

demo upgrade
removed hardcoded key, made builder space taller
Merge pull request #62 from teharrison/master

 	removed hardcoded key, made builder space taller
Merge branch 'master' of github.com:MG-RAST/Retina

Conflicts:
	widgets/widget.NotebookDashboard.js
	widgets/widget.VisualPython.js