automatically mount USB sticks when outside of LXDE

[asb]

See request at http://www.raspberrypi.org/phpBB3/viewtopic.php?p=102397#p102397

Probably seems to be that udisks generates events, but unless we're in lxde nothing is receiving and acting upon them. udisks-glue might do the trick

[typhoon71]

make it mount usb harddisks too please...