hdf5_ep

Merge pull request #654 in HDFFV/hdf5 from ~BMRIBLER/hdf5_bmr_cpp3:develop to develop

Merge after making the changes Dana suggested.

* commit '47a2d5e48f5f3dcfed57c5be01178952030828c2':
  Adding variable initialization Platforms tested:     Linux/32 2.6 (jam)     Linux/64 (platypus)     Darwin (osx1010test)
  Adding new C++ wrappers Description:     Added wrappers for H5Tencode to class DataType and H5Tdecode to     classes DataType and its subclasses.