error message if teacher tries to register student for masterclass but there is not enough places
must work but doesnt
samt without debugger
issue fixed (2 new error messages to be translated)
Merge pull request #30 from smartdec/iss3195

Iss3195
Merge pull request #28 from smartdec/iss3183-1

Iss3183 1
Merge branch 'select/release' of https://github.com/smartdec/edx-platform into iss3206