ENH: Updated SlicerRT: Release 0.8.0. New Contour Morphology module; Importing of RT Plan beams; Various fixes. See more info at https://www.assembla.com/code/slicerrt/subversion/changesets/compare/523..586

...orting of RT Plan beams; Various fixes. See more info at https://www.assembla.com/code/slicerrt/subversion/changesets/compare/523..586