hdfview

Merge pull request #199 in HDFVIEW/hdfview from ~BYRN/hdfview_adb:master to master

* commit 'acb0deea1f8db23629e353befad5806af26674e1':
  StringBuilder fix
  Comment out regref substring
  Fix filter-compression text
  StringBuilder fixes
  Sonar bug fixes
  Fix Datatype test
  Sonar issue fixes