hdfview

Merge pull request #101 in HDFVIEW/hdfview from ~JHENDERSON/hdfview:hdfview-3 to hdfview-3

* commit '0fd571ca494da1bf63a653dcf5895f04fb305d7c':
  Fix for one TAttr2 failure
  Correctly extract compound info for ARRAY and VLEN of compound
  Updates to handle VLEN of Compound
  Improvements for VL types
  Add scrollbars to CellValueField