[PATCH] Missing Binding for svn_checksum_t

Hi,
I have generated the attached [PATCH] as a part of the contribution i
wanted to make towards the subversion's swig-py project as a part of the
OPW program.
Having chosen the Python Bindings Problem, i tried learning all the
prerequisites for me to become able to contribute even in the mildest of
substance.
Following a strong support from the mentors and co-mentors i however
managed to grasp many concepts (swig,typemapping,python-c api's,avn) in
the course of last week and am posting the typemap i have written to map
the function svn_checksum_t in /subversion/include/svn_checksum.h , the
typemaps i look to put into the
/subversion/bindings/swig/include/svn_checksum.swg file.

Log Message:
subversion/bindings/swig/include
(svn_checksum_t.swg) : Generated a typemap.
(svn_checksum_kind_t,svn_checksum_create,svn_checksum_clear): typemapped
these functions

Suggested by: Stefan Sperling <stsp_at_elego.de>
              Ben Reser <breser_at_fornix.brain.org>
              Daniel Shahaf <~danielsh_at_apache>

I hope this PATCH is incorporated and i am able to contribute substantially
to the subversion community.

Regards,
Shivani Poddar
Sophomore,
International Institute of Information Technology, Hyderabad