hdf5_ep

[svn-r6425] Purpose:
    Update
Description:
    Big change to the H5FD.c module:

        - Split apart H5FD_alloc and H5FD_free. H5FD_alloc was huge and
          H5FD_free had a freeing of the freelist part which I needed to
          call from the SAP.
        - Added support for FPHDF5. If it's a client, then it sends the
          allocation or free request to the SAP. The SAP will call the
          same code, but it'll actually do the allocation/freeing in that
          case.
Platforms tested:
    Linux & Modi4