ajaxfn() is called every time the torrent list is filtered. This function
calls itself after a predefined amount of time by setting a timer. If
the function is called manually without destroying the timer, the
frequency of the XHR requests will increase.
Fix this by saving a reference to each timer that is created so that
they can be later destroyed.
Add also two helper functions to request updated data safely.
Sizes are now given in bytes.
Dates are Unix timestamps and converted to ISO 8601 in the web UI.
Numbers are not converted to strings.
-1 is returned for undefined values.
Some keys have been splitted:
Torrent list (json/torrents)
* num_seeds: Torrent seeds connected to
* num_complete: Torrent seeds in the swarm
* num_leechs: Torrent leechers connected to
* num_incomplete: Torrent leechers in the swarm
Torrent generic properties (propertiesGeneral/hash)
* total_uploaded: Total data uploaded
* total_uploaded_session: Total data uploaded this session
* total_downloaded: Total data dowloaded
* total_downloaded_session: Total data downloaded this session
* time_elapsed: Torrent elapsed time
* seeding_time: Torrent elapsed time while complete
* nb_connections: Torrent connection count
* nb_connections_limit: Torrent connection count limit
Global transfer info (json/transferInfo)
* dl_info_speed: Global downalod rate
* dl_info_data: Data downloaded this session
* up_info_speed: Global upload rate
* up_info_data: Data uploaded this session
Closes#1524.
