Merge pull request #15 from smartdec/iss3194

Iss3194
fixes and style
fixes access
Merge branch 'select/release' of https://github.com/smartdec/edx-platform into select/release
view_cerf renamed to course_cert (was it a mistake?)
"...in Studio" buttons invisible for teachers (issue 3384)
Beta testers page visible for teachers (issue 3429)
fix