fixes
- removed hardcoded Arduino workshop
- added allow_button attribute to records which determines whether a 'Register' button should be displayed
Merge remote-tracking branch 'origin/master'

Conflicts:
	app/templates/courses.html
	app/templates/createCourse.html
	app/views/admin.py
fixes
- fix feedback page so it doesn't look horrendous after the change to bootstrap 3.0.x