hdf5

Merge pull request #323 in HDFFV/hdf5 from ~BMRIBLER/hdf5_bmr_cpp:develop to develop

Replaces tabs with spaces.

* commit '8f5a1f43d0cf527488be2b2805bac2b6c86b8c66':
  Description:     Only format changes: mostly tabs vs. spaces Platforms tested:     Linux/64 (jelly) - very minor