Version beta9

Added missing indicies on TSVECTOR fields

New field latest_snapshot_event in table issue specifying the type of the latest snapshot taken

Added weight field also for (intermediate) delegating members in snapshot and voter tables

Possibility for an initiative to specify a URL where an external discussion takes place (discussion_url)

Export concept for creating a database dump, without some non-public information (e.g. private contact data), including:
- Shell script lf_export
- Database function delete_private_data()

Field in member table to be used by a frontend to store information about hints being hidden by the user

Minor cleanup / New comments