plu - plu: Example and a bit of documentation.

Log Message:
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Example and a bit of documentation. Added a simple ANT build file

Modified Files:
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plu:
.cvsignore (r1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plu/plu/.cvsignore.diff?r1=1.1&r2=1.2)

Added Files:
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plu:
build.xml (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plu/plu/build.xml?rev=1.1&content-type=text/x-cvsweb-markup)
plu/sql:
examples.sql (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plu/plu/sql/examples.sql?rev=1.1&content-type=text/x-cvsweb-markup)
plu/doc:
USAGE.txt (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plu/plu/doc/USAGE.txt?rev=1.1&content-type=text/x-cvsweb-markup)