set up workflow with transifex.com for localization
(from redmine: created on 2012-09-26, closed on 2012-12-19, blocks #911 (closed), precedes #664 (closed), precedes #663 (closed))
(from redmine: created on 2012-09-26, closed on 2012-12-19, blocks #911 (closed), precedes #664 (closed), precedes #663 (closed))