[ansel] Patch for user pref image type

[Chuck Hagenbuch]

Quoting "Heath S. Hendrickson" <heath at outerspaceconsultants.com>:

> Seeing wisdom in Ben's comment (and Chuck's agreement), attached is a
> patch that will allow the system admin to configure the file type for
> created images.  It's a patch against config/conf.xml and
> lib/Ansel.php.  I've removed it from the pref area as it was never
> really intended for per-user configuration (it was just the first place
> I thought to put it).

This was already done this afternoon, cleaner.

-chuck

--
Charles Hagenbuch, <chuck at horde.org>
"Here, I brought some cole slaw. It's made from peeeooople! Just kidding."