[kovidgoyal]

I had ten minutes, so I ported Generate Cover. Note I have only ported the code, not tested it (beyond that it runs). So someone that uses it should test it. Note that this plugin will not work with non-beta/older versions of calibre, as I lack the time/motivation to implement backward compatibility. If someone wants to implement backward comapatibilty the easiest way would be rename draw.py to draw2.py and conditionally import it based on calibre version.

EDIT : never mind, I implemented backwards compatibility as well