hdfview

Merge pull request #30 in HDFVIEW/hdfview from ~BYRN/hdfview_adb:hdfview-3 to hdfview-3

* commit 'c5bc398df0f977e52daa7908d18d5957ba8e494b':
  Add --help comment to readme
  Fix indentation
  HDFVIEW-43 array of vlen strings needed a row multipler
  Revert to default values
  HDFVIEW-42 Add Attribute display