pginstaller - pginst: add the spanish translation.

Log Message:
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add the spanish translation.
Per Mariano Reingart.

Modified Files:
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pginst/lang:
languages.projinc (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/lang/languages.projinc.diff?r1=1.5&r2=1.6)

Added Files:
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pginst/lang:
es.xml (r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/lang/es.xml?rev=1.2&content-type=text/x-cvsweb-markup)
es_welcome.rtf (r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/lang/es_welcome.rtf?rev=1.2&content-type=text/x-cvsweb-markup)