qingy 0.7.2

- SECURITY FIX: fixed bug where session locking did not work if there was
more than one running session that required it.
- Made running time screen saver less CPU hungry.
- Added support for zsh shell.
- Fixed last login time for 64 bit machines, thanks to Kevin Jamieson.
- Added EXPERIMENTAL session timeout feature, with configurable timeout
and actions (you can select either 'close your session' or 'lock it').
Right now, locking your session works, closing it may hang your machine
(in case of an X session) because qingy might be restarted before X
finishes shutting down. Try it at your own risk ;-)