[logback-dev] Adding Logback-Gelf to downloads page

Hi all, First time posting to the list. Congrats on turning 1.0.0. I've written a logback appender that sends log messages to a Graylog2<http://www.graylog2.org/> server. Graylog2 is an open source project that provides a java server to store incoming logs in MongoDB, and a RoR web interface to view those logs. And it's awesome. My plugin, Logback-Gelf <https://github.com/Moocar/logback-gelf>, has been out in the wild for about 6 months so I thought I'd see if I could get it added to the third-party tools section on the logback downloads page. Cheers! Anthony @Moocar <http://twitter.com/#!/Moocar>