hdfview

Merge pull request #65 in HDFVIEW/hdfview from ~BYRN/hdfview_adb:hdfview-3 to hdfview-3

* commit 'd63acd02b135afd081e9e9cf2f11774c67f677c3':
  Add dataset check
  Add new test file for cut, copy, paste
  HDFVIEW-165 Update links test
  Update softlinks to nonexist target