Continue and improve Device plugin

[GoogleCodeExporter]

There's currently a basic sketch of a Device plugin using dbus to detect 
devices plugged in to the PC. This is a very important feature that is 
supported by Calibre.

We should take into account:

- Not only detect devices when they're plugged in, but also search for devices 
already mounted when Aranduka starts.

- The current sample uses dbus and connects to the interface 
org.gtk.Private.RemoteVolumeMonitor. That's very GTK-specific. Using HAL may be 
a better way for Linux and also seems to provide with more information (see: 
http://stackoverflow.com/questions/469243/how-can-i-listen-for-usb-device-insert
ed-events-in-linux-in-python)

- We should implement a driver interface that allows us to develop specific 
drivers for different devices. I currently own a Sony Reader, so I could work 
on its driver. There should also be a generic driver for USB storage devices 
(pendrives, portable hdd, etc.).

Original issue reported on code.google.com by andresgattinoni on 24 Jan 2012 at 5:47

[GoogleCodeExporter]

Started to play with this on revision 5fa308774168.

Original comment by andresgattinoni on 24 Jan 2012 at 6:21

• Changed state: Started