hdfview

Merge pull request #6 in HDFVIEW/hdfview from ~JHENDERSON/hdfview:master to master

* commit '4a8b3916ec6e2d1e58544d912d68d63745740051':
  Clear any object information shown when tree selection is cleared
  Enum Changes:
  Update TextView to correctly write back text data
  Change "Show Properties" to "Show Attributes"
  Update CellSelectionListeners after rewrite of DataProviders