hdf5

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

* commit '5fe1216a4e6af8feef0551f7bece8a0e193310a9':
  Fix return type for H5Sselect_intersect_block().
  Updated H5TRACE macro.
  Add H5Sselect_shape_same and H5Sselect_intersect_block API routines, along with tests and minor cleanups and refactorings.