hdf5_ep

Merge pull request #785 in HDFFV/hdf5 from ~BYRN/hdf5_adb:hdf5_1_8 to hdf5_1_8

* commit '191f4c1e6d4060541958d960c7f96ec014e8194f':
  Another fix for error handling
  HDFFV-10328 fix whitespace
  HDFFV-10328 set external reference before copy
  Fix windows link error
  HDFFV-10328 Updated notes
  HDFFV-10328 - move declaration to top of function
  HDFFV-10328 - fix typo
  HDFFV-10328 -Allocate H5Zclass structure from dlopened plugin.
  HDFFV-10329 - add new jira issue.
  Fix linking of libs