Update ruby-pg to 0.14.1.

== v0.14.1 [2012-09-02] Michael Granger <ged@FaerieMUD.org>

Important bugfix:

- Fix stack overflow bug in PG::Result#values and #column_values (#135). Thanks
  to everyone who reported the bug, and Lars Kanis especially for figuring out
  the problem.

PostgreSQL 9.2 beta fixes:

- Recognize PGRES_SINGLE_TUPLE as OK when checking PGresult (Jeremy Evans)

Documentation fixes:

- Add note about the usage scope of the result object received by the
  #set_notice_receiver block. (Lars Kanis)
- Add PGRES_COPY_BOTH to documentation of PG::Result#result_status. (Lars Kanis)
- Add some documentation to PG::Result#fnumber (fix for #139)

(taca)