button in main window or in scan popup added. It is also possible to
configure the program to do that automatically.
+ It is now possible to specify which program to use for audio file playback.
which can provide results asyncronously, be discarded prematurely etc. This
work touches just about every piece of exiting code.
+ On top of the new interface, MediaWiki (Wikipedia) support was added.
* Some other small fixes might went along.