hdf5

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

* commit '5ad3891d9b861593ebe25d540bed2d913eb83aba':
  Remove ' ' (typo).
  Code improvement
  Removed an extra "using" statement
  Adding documentation
  More changes to align with incoming selection improvements.
  Added C++ wrapper for H5Ovisit2
  Adding a C++ wrapper