Commits
Merging in latest from upstream (HDFFV/hdf5:refs/heads/hdf5_1_8) * commit 'e964568753bcdca01af1bdc0d8b5ee6f4d314243': Snapshot version 1.8 release 20 (snap3)
Merging in latest from upstream (HDFFV/hdf5:refs/heads/hdf5_1_8) * commit 'e964568753bcdca01af1bdc0d8b5ee6f4d314243': Snapshot version 1.8 release 20 (snap3)