ticket_570: proper exception handling for recommender
Original error message is now preserved
Merge pull request #178 from lbjay/master

fixes #573: footer feedback link
Merge pull request #179 from lbjay/master

shell.py command for updating api user permissions
Merge pull request #176 from ehenneken/ticket_570

ticket_570: proper exception handling for recommender
removed unused imports
git rid of ugly UnresolvedImport flags