hdfview

Merging in latest from upstream (HDFVIEW/hdfview:refs/heads/hdfview-3)

* commit '1715e2b7d3e8e3e521d0079f67c531eb4a308f28':
  Javadoc fixes
  Update copyright
  Updates for RELEASE.txt
  Fix DataValidatorFactory for VLEN-string types
  Correctly create vlen-string datasets and datatypes
  Update release text