Changes

session: remove 01dbus session files
In Maemo Leste there currently is /etc/init.d/dbus-user which sets up 
dbus sessions, and this script unconditionally nuked all of that. Simply
not including this script will have all the services on the same user
bus.
See also https://github.com/maemo-leste/bugtracker/issues/232

debian/changelog: bump for 0.5.3