hdf5_ep

[svn-r3958] 
Purpose:
    HPUX 11.00 port
Description:
    Redundant USE statements triggered a bug in the HP F90 compiler.
Solution:
    Source code was rearranged to avoid redundancy: definitions of the
    object and dataset region reference types were moved from H5Rff.f90
    to H5f90global.f90; "USE H5R" statement was removed from H5Rff.f90.
    Now H5Rff.f90 uses "USE H5GLOBAL" statement only as the rest of
    the modules.

Platforms tested:
    HPUX 11.00 (kelgia), Solaris 2.7 (arabica)