hdf5_ep

[svn-r9493] Purpose:
Fix SZIP filter to dynmically detect encoder.

Description:

Solution:
See:
http://hdf.ncsa.uiuc.edu/RFC/SZIP/Szip_dynamic_12_Oct.pdf

Platforms tested:
verbena, arabica, cobalt.

Note RE testing:
All automatic tests work as before.

The feature is a configuration thing, so the tests are manual.
Tested with the following configs:
  pre-release version of SZIP, with dynamic library,
   1. no SZIP
   2. SZIP, decoder only
   3. SZIP, encoder+decoder
  released (static lib) SZIP
   4. no SZIP
   5. SZIP, decoder only
   6. SZIP, encoder+decoder

  after build, switch szip in LD_LIBRARY_PATH at run time
   7. SZIP decoder
   8. SZIP encoder

Misc. update:
Manifest updated