dbi-link - dbi-link: * More schema-qualifying in functions.

Log Message:
-----------
* More schema-qualifying in functions.

* Cleaned up write functions insert, update, delete.

* Fixed regular expression substitution of table in write functions.

* Factored out some I/U/D functionality into a new function called
  make_pairs.

* Found and fixed closure bug in UPDATE.  Functions now pass the
  trigger payload instead of assuming it is in the environment.

* Renamed insert, update, delete to do_insert, do_update, do_delete to
  avoid namespace collisions.

* Added requirement for DBI 1.43 per bug report on mailing list.

Modified Files:
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    dbi-link:
        dbi_link.sql (r1.7 -> r1.8)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/dbi_link.sql.diff?r1=1.7&r2=1.8)