Changes to models.py for better uniformity in naming, changes to location.sql for efficiency (indexes created and make sure a group is only ever associated to a single cluster)
Merged location.sql into schema.sql
Fixed typo
Improved cleanup.py, now handles automatic groups.

Improvements to the script `cleanup.py` that cleans up the groups that are
inactive. Now it also takes care of correctly clean up automatic groups.
add groupstreamers features, edit iterative method
Fixed typo
Merge branch 'groupSuggestion'