This used to be de.desy.css.jprobe, which in turn is based on code from Ken Evans.

- Changed package name.
- Use org.csstudio.util.pv, removed local copies of CA client jars and Windows executables.
- Added icon.
- Added context menu oject contribution for 'PV'-type selections.
- One can 'drop' a PV name into the PV name text box.

  'Drag' doesn't work because I cannot figure out how to get that from a text box. So far the 'drag' simply refuses to start, maybe because the Text box already handles all the mouse actions in a different way.
  For similar reasons, I so far didn't get a context menu added to the Text box.