Ported the demo plguin to the opml namespace.  First test on working
with ElementTree to parse the OPML file.
Added the OPML functionality to calibre. But it doesn't seem to import
the feeds yet :/
Importing of OPML works. Next step: improve GUI.
Added a propper GUI.
Added a new icon. Removed the shortcut key.
Merge branch 'master' of https://github.com/ingkebil/OMPL2Recipe