merged branch mlehner/default_timezone (PR #635)

Commits
-------

5699753 added setTimezone to allow globally overriding the timezone when formating dates

Discussion
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Allow setting global timezone for date formatting

My API returns dates in a string format of 2012-02-14T00:35:37+00:00. When parsed by the DateTime constructor, the timezone for that new object is UTC. Without specifying every time I use the date filter there was no way to globally influence the timezone used.

I added setTimezone() to the core extension that functions similar to setDateFormat() except that there is no timezone set by default to allow for backwards compatibility.

diff --cc lib/Twig/Extension/Core.php
index 6225557,ae25758..cfbdbdc
--- 1/lib/Twig/Extension/Core.php
--- 2/lib/Twig/Extension/Core.php
+++ b/lib/Twig/Extension/Core.php
@@@ -401,8 -367,12 +426,12 @@@ function twig_date_converter($date = nu
  
          $date->setTimezone($timezone);
      }
+     else if (($timezone = $env->getExtension('core')->getTimezone()) instanceof DateTimeZone)
+     {
+         $date->setTimezone($timezone);
+     }
  
 -    return $date->format($format);
 +    return $date;
  }
  
  /**