hdf5_ep

[svn-r477] Changed the way file-space allocation for the data part of a dataset.

H5D.c:
    Created a new function H5D_allocation to do allocation of all datasets.
    According to the storage layout, it calls the appropriate function.

H5Fprivate.h:
H5Fistore.c:
    H5F_istore_allocation now takes a dimension array, (old version
    used a space pointer) to determine how many chunks to allocate.
    Changed H5F_istore_get_addr to a private (static) function.  No
    one outside of H5Fistore.c is calling it.
    Removed three forward declarations now that they are not needed.

Tested platform:
O2K