Port to Python 3
Fix broken trash deletion on some systems by directly using Gio libraries
Fix potential log file corruption when trying to start multiple instances
Support for setting GNOME Screensaver / GDM background
Removed outdated functionality for publishing to Facebook
Updated URL for QuotationsPage plugin
Update default clipboard_hosts: add deviantart.net, imageshack.com; remove (dead) ns223506.ovh.net