Next part of the battery plasmoid, the visualisation part.

On *my* machine, this renders a good-looking battery (thank to Ken's mad Inkscape skills) on the desktop. There's a README briefly explaining how to manipulate the looks. This applet is using the Battery DataEngine, but might be ported to the solidengine (I have to have a look at it, it's quite new).

Bugs and crashes: I'm a n00b, but willing to learn.