The application now uses its own definition of severity. Previously the
application would set a failed build to "not_built", now the status will
stay at "failure".
Added a new setting that allows to upload builds with result UNSTABLE.
Previously only builds that completed with SUCCESS would be uploaded
(this is still the default). The settings allows to override this.

If a job has multiple stores it uploads the artifacts to, the setting
can be configured separately for each store.
Build against current Jenkins version.
Proxy settings are now actually used, before the settings were never
forwarded to the request. Settings are now also per store instead of
global.