- improved file structure for _Model_ classes (`app/main/model/..`). Group by database name
- improved database connection handling (fixed persistent DB connections)
- new "Redis monitoring" UI on `/setup` page, closed#745
- improved request handling for 3rd party APIs (ESI, SSO, GitHub) see [exodus4d/pathfinder_esi/README.md](https://github.com/exodus4d/pathfinder_esi/blob/b5d4b19/README.md)
- improved `/setup` page, new actions for clear cache/Redis data
- switched "constellation search" Ajax endpoint data source from _SDE_ DB to new _eve_universe_ DB, #628
- improved "system search" field, multiple changes/fixes see #644