Added documentation, why a "super.close()" shouldn't be used here 
Added "Class <?> createPropertyClass()" to the property factories and
the property factory container in order to enable EPL licensed
parts (GUI) getting a reference to the class object of properties,
which are implemented by GPL2 licensed parts. At the moment, this is
used within fog.video.view.
Added more debug output.
Documentation translated.
Added more debug output.
Added class "DoubleComboPropertyParameterWidget", which is used within
fog.video.view for selecting both the input and output video codec of
the desired transcoding gate.
Aligned interface to the modifications in main plugin "fog".
Documentation translated/updated.
Code cleanup.
Removed unnecessary TODOs.