The icons are mostly derived work from other icons. As such they are
licensed accordingly to the original license:

    Eclipse: Eclipse Public Licence
    Nuvola: LGPL
    Crystal: LGPL
    OOo: LGPL

Unless stated in this file, icons are work of enthought, and are released
under a 3 clause BSD-like license.

Files and orginal authors:
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                          actor.png | Nuvola
                     coordinate.png | Crystal
                         filter.png | Nuvola
                    lookuptable.png | OOo
                         mapper.png | Crystal
                       polydata.png | Nuvola
                       property.png | Eclipse
                         reader.png | Crystal
                       renderer.png | Crystal
       rendererwindowinteractor.png | Nuvola
                         source.png | OOo
                        texture.png | Eclipse
                         window.png | Eclipse