- upgraded [_Raphaël_](https://dmitrybaranovskiy.github.io/raphael) js lib `v2.1.2` → `v2.2.8`
- improved performance for client map sync - fixed client map sync for "bubbled" endpoints #301 - fixed a bug where connections appear 2x after saved/deleted it - removed Google+ links
- improved file structure for _Model_ classes (`app/main/model/..`). Group by database name - improved database connection handling (fixed persistent DB connections)