Bug 846362 - Redirect /community pages to /contribute

Redirect the following URLs to /contribute

http://www.mozilla.org/community/
http://www.mozilla.org/community/index.fr.html
http://www.mozilla.org/community/index.de.html
http://www.mozilla.org/community/index.hr.html
http://www.mozilla.org/community/index.sq.html

Didn't use a more broad regex because there are some other pages still living in the /community/ dir that aren't ported/redirected yet.