hdf5_ep

Merge pull request #420 in HDFFV/hdf5 from ~BMRIBLER/hdf5_1_8_bmr:hdf5_1_8 to hdf5_1_8

* commit '1b907d93d7ec3d8beb64cb084ceb2c9b4b436cbb':
  Miscellaneous clean-up: format and comments Platforms tested:     Linux/64 (jelly) - very minor