hdfview

Merge pull request #263 in HDFVIEW/hdfview from ~BYRN/hdfview_adb:bugfix/HDFVIEW-244-does-not-open-netcdf3 to master

* commit 'bd6c5a56688f4259bc7ec48b17b81ca87c5e7890':
  Revert group open and close.
  Fix comments and and some variables
  Fix TODO comment
  Correct name of format
  Comment DEBUG only log statement
  Netcdf3 files now supported through netcdf-4.3.23