hdf5_ep

[svn-r6553] Purpose:
To add tests for szip compression in HDF5

Description:
Three tests were added:
1) szip filter itself
3) szip + shuffle + fletch32
2) fletch32 + shuffle + szip


Solution:
Since H5Dget_storagesize returns 0(Quincey can fix it or it may be gone),
I create another function called test_internal_filter_szip, which is the almost the same
as test_internal_filter but comments out H5Dget_storage_size function.


Platforms tested:
Since there are changes of configure.in and configure,I didn't use h5committest.
I tested with four platforms.
1) Linux 2.4 (eirene)                                                                                               2) Solaris 2.7(arabic
3) windows 2000(VS 6.0)                                                                                             4) SGI IRIX6.5-64(modi4)
For test 1)-3), only basic C tests were done                                                                        For modi4 test, I tested 64-bit C,parallel and fortran.
All tests passed, except a warning message from szip library when checksum is used in some order, which doesn't     cause any real problems.

Misc. update: