psqlodbc - psqlodbc: Add installer upgrade script.

Log Message:
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Add installer upgrade script.

Modified Files:
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psqlodbc:
Makefile.am (r1.28 -> r1.29)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/Makefile.am.diff?r1=1.28&r2=1.29)

Added Files:
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psqlodbc/installer:
upgrade.bat (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/installer/upgrade.bat?rev=1.1&content-type=text/x-cvsweb-markup)