Beginnings of improved exporters.
Using virtual model for object view.
Views and annotated graph now use database view.
Merge branch 'db_views_as_virtual_models' into improved_exporter
Exporters now run in acceptable time.
Adding override_column option and fixing default fields for exporter.
Adding migration for view.
Adding migration for 1.6.
Fixing id field for view.
Fixing problem with calculated primary key.
Exporter now works also as postprocessor of query.
Removing print statements.
Cranking up number of objects allowed for input to exporter
Making number of objects allowed for input to exporter configurable.
Removing comments.
Merge branch 'f787_improved_exporter' into development