Support progress information when creating torrents remotely. For this to be possible, a method was added to the `RPCServer`, `emit_event_for_session_id()`, which does exactly what is says. This is needed because the event created, `CreateTorrentProgressEvent` needs to be addressed to a single session id, not all session ids interested in that event.
Fixed a bug that apparently was not found yet. When creating torrents locally, we defer that task to a thread. Since this thread updates UI widgets, namely the progress bar info and since we can't guarantee that it's the main thread, updating the widgets must be done by calling `gobject.iddle_add()`.
Passing `-r` to the cli's while also passing `-l` will make the logfile rotate when reaching 5Mb in size. Three backups will be kept at all times.
All deluge's code is now using this new style logging along with the git hosted plugins. For other plugins not hosted by deluge, which still imports `LOG` as the logger, a deprecation warning will be shown explaining the required changes needed to use the new style logging. New plugins created by the `create_plugin` script will use the new logging facilities.
