pgtcl - libpgtcl: * Add gen_update_from_array and

Log Message:
-----------
* Add gen_update_from_array and perform_update_from_array to Postgres
helper package.

Modified Files:
--------------
libpgtcl:
ChangeLog (r1.60 -> r1.61)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/ChangeLog?r1=1.60&r2=1.61)
libpgtcl/playpen/pghelpers:
postgres-helpers.README (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/playpen/pghelpers/postgres-helpers.README?r1=1.2&r2=1.3)
postgres-helpers.tcl (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/playpen/pghelpers/postgres-helpers.tcl?r1=1.3&r2=1.4)