Log Message:
-----------
Updated readme with upgrade steps.
Modified Files:
--------------
pgstatspack:
pgstatspack_README.txt (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatspack/pgstatspack/pgstatspack_README.txt.diff?r1=1.2&r2=1.3)