NoClassDefError in Knime

But otherwise it's starting to get better.

DescriptorSets are "detected" automatically (they just have to be added
to an enum)
It is possible to add multiple instances of a DescriptorSet, mark
different Descriptors in each and have the active ones returned.

TODO:

1. Add support for annotations, mainly for the parameters (otherwise I
can't decide which JComponent has to be added, a JSlider, a JSpinner,
etc). Also the name of the descriptors should be available via
annotation.

2. A SettingsModel has to be created.

3. Find out why a NoClassDefFoundException is thrown when running in
Knime.

4. Make the GUI more beautiful, currently it looks just ugly.