Log Message:
Update ruby-tzinfo package to 0.3.15.

== Version 0.3.15 (tzdata v2009p) - 26-Oct-2009

* Updated to tzdata version 2009p
  (http://article.gmane.org/gmane.comp.time.tz/2953).
* Added a description to the gem spec.
* List test files in test_files instead of files in the gem spec.

== Version 0.3.14 (tzdata v2009l) - 19-Aug-2009

* Updated to tzdata version 2009l
  (http://article.gmane.org/gmane.comp.time.tz/2818).
* Include current directory in load path to allow running tests on
  Ruby 1.9.2, which doesn't include it by default any more.