UI fix: notifications do not drop to the bottom of page now if there are many submissions.
Merge pull request #139 from LassiHaaranen/assistant_feedback

UI fix for notifications
Merge pull request #140 from LassiHaaranen/master

Improvements to teacher's view. Move exercises between modules.
Merge pull request #141 from LassiHaaranen/master

Increased the length of filenames in submissions
Added python-dev to prerequisites
An application enabling login to external LTI services.
Safe course identifier for multiple A-plus installations using same consumer key.
Header for menu links, Migrations
Added note about LTI 1.0 version and testing against Piazza. Went
through the list of recommended LTI parameters and added some.
Merge pull request #142 from teemulehtinen/master

An application enabling login to external LTI services.
Moved LTI Services under External Services. Added external link service.
Merge pull request #143 from teemulehtinen/services

Moved LTI Services under External Services and added external Link Service
Added example exercise that has file attachments