Libtorrent

* fix long filename truncation on windows
* distinguish file open mode when checking files and downloading/seeding
with bittorrent. updates storage interface
* improve file_storage::map_file when dealing with invalid input
* improve handling of invalid utf-8 sequences in strings in torrent files
* handle more cases of broken .torrent files
* fix bug filename collision resolver
* fix bug in filename utf-8 verification
* make need_save_resume() a bit more robust
* fixed sparse flag manipulation on windows
* fixed streaming piece picking issue

* make rename_file create missing directories for new filename
* added missing python function: parse_magnet_uri
* fix alerts.all_categories in python binding
* fix torrent-abort issue which would cancel name lookups of other torrents
* make torrent file parser reject invalid path elements earlier
* fixed piece picker bug when using pad-files
* fix read-piece response for cancelled deadline-pieces
* fixed file priority vector-overrun
* fix potential packet allocation alignment issue in utp
* make 'close_redudnant_connections' cover more cases
* set_piece_deadline() also unfilters the piece (if its priority is 0)
* add work-around for bug in windows vista and earlier in
GetOverlappedResult
* fix traversal algorithm leak in DHT
* fix string encoding conversions on windows
* take torrent_handle::query_pieces into account in torrent_handle::statue()
* honor trackers responding with 410
* fixed merkle tree torrent creation bug
* fixed crash with empty url-lists in torrent files
* added missing max_connections() function to python bindings

* fix string encoding in error messages
* handle error in read_piece and set_piece_deadline when torrent is removed
* DHT performance improvement
* attempt to handle ERROR_CANT_WAIT disk error on windows
* improve peers exchanged over PEX
* fixed rare crash in ut_metadata extension
* fixed files checking issue
* added missing pop_alerts() to python bindings
* fixed typos in configure script, inversing some feature-enable/disable flags
* added missing flag_update_subscribe to python bindings
* active_dht_limit, active_tracker_limit and active_lsd_limit now
interpret -1 as infinite

* fixed verbose log error for NAT holepunching
* fix a bunch of typos in python bindings
* make get_settings available in the python binding regardless of
deprecated functions
* fix typo in python settings binding
* fix possible dangling pointer use in peer list
* fix support for storing arbitrary data in the DHT
* fixed bug in uTP packet circle buffer
* fix potential crash when using torrent_handle::add_piece
* added missing add_torrent_alert to python binding

* udp socket refcounter fix
* added missing async_add_torrent to python bindings
* raised the limit for bottled http downloads to 2 MiB
* add support for magnet links and URLs in python example client
* fixed typo in python bindings' add_torrent_params
* introduce a way to add built-in plugins from python
* consistently disconnect the same peer when two peers simultaneously connect
* fix local endpoint queries for uTP connections
* small optimization to local peer discovery to ignore our own broadcasts
* try harder to bind the udp socket (uTP, DHT, UDP-trackers, LSD) to the
same port as TCP
* relax file timestamp requirements for accepting resume data
* fix performance issue in web seed downloader (coalescing of blocks
sometimes wouldn't work)
* web seed fixes (better support for torrents without trailing / in
web seeds)
* fix some issues with SSL over uTP connections
* fix UDP trackers trying all endpoints behind the hostname

* raise the default number of torrents allowed to announce to trackers
to 1600
* improve uTP slow start behavior
* fixed UDP socket error causing it to fail on Win7
* update use of boost.system to not use deprecated functions
* fix GIL issue in python bindings. Deprecated extension support in python
* fixed bug where setting upload slots to -1 would not mean infinite
* extend the UDP tracker protocol to include the request string from the
tracker URL
* fix mingw build for linux crosscompiler