hdf5doc

Description:
    Add to sandbox:
        DataFiltering/         Data Filtering in HDF5
        Dataspaces/            Proposed update from UG Dataspaces chapter
                                  "Section 3 Definitions of the Dataspace 
                                  Objects and Programming Model"
        DataStorage_and_IO/    Data Storage and I/O in HDF5 (2009 LCI Tutorial)
        FileFormatWalkthrough/ HDF5 File Format Discussion
                                  A "guided tour" of the file format
        GenericProperties/     Generic Properties Overview and Justification
        RawIOFlow/             HDF5 Raw I/O Flow Notes
    Status: This is raw material, draft material, or slides for a talk.