AndStatus v.15.0 released. "Discovery of open GNU Social instances" 1. Implemented discovery of open GNU Social instances (servers) using the new "get_open_instances" http://status.hackerposse.com/url/6724 API. From now on there is no need to have all open instances preconfigured in AndStatus: a User may select new "Microblogging system" from a live list, downloaded via an onli…