hdf5_ep

Merging in latest from upstream (HDFFV/hdf5:refs/heads/hdf5_1_8)

* commit 'f3022b3d23b50e07aaf39d7a7589c4515ab09b42':
  Delete files inadvertently checked in with version changes following snapshot release.
  Snapshot version 1.8 release 19 (snap0)