Improved group functionality added: now it is possible to get an aggregated view on the group members content via /group/* pages. Additionally, the tag filter is now case insensitive and you can jump to the page for the first filtered tag by just pressing return; broken bibtex URLs are now repaired on the fly and not in the database.
Today we added some more functionality for groups. On the group page you can now see all users which are in the group. This behaviour can be controlled by the group admin on the settings page. Furthermore the group admin can now remove users from a group -- all posts of the removed user which were viewable for the group members become automatically "private". So nothings gets lost. We also enhanced prev/next navigation and added a counter to the search page.
different solutions for: Cannot create JDBC driver of class...
Update: Tomcat's standard data source resource factory is org.apache.tomcat.dbcp.dbcp.BasicDataSourceFactory
J. Mauro, M. Nieke, C. Seidl, and I. Yu. Proceedings of the 21st International Systems and Software Product Line Conference - Volume B, page 18--21. New York, NY, USA, ACM, (2017)