Python-libtorrent

* fixed uTP vulnerability
* make utf8 conversions more lenient
* fix loading of piece priorities from resume data
* improved seed-mode handling (seed-mode will now automatically be left when
performing operations implying it's not a seed)
* fixed issue with file priorities and override resume data
* fix request queue size performance issue
* slightly improve UDP tracker performance
* fix http scrape
* add missing port mapping functions to python binding
* fix bound-checking issue in bdecoder
* expose missing dht_settings fields to python
* add function to query the DHT settings
* fix bug in 'dont_count_slow_torrents' feature, which would start too many
torrents

* improve ip_voter to avoid flapping
* fixed bug when max_peerlist_size was set to 0
* fix issues with missing exported symbols when building dll
* fix division by zero bug in edge case while connecting peers

* fix bug in python binding for file_progress on torrents with no metadata
* fix assert when removing a connected web seed
* fix bug in tracker timeout logic
* switch UPnP post back to HTTP 1.1
* support conditional DHT get
* OpenSSL build fixes
* fix DHT scrape bug

* python binding build fix for boost-1.57.0
* add --enable-export-all option to configure script, to export all symbols
from libtorrent
* fix if_nametoindex build error on windows
* handle overlong utf-8 sequences
* fix link order bug in makefile for python binding
* fix bug in interest calculation, causing premature disconnects
* tweak flag_override_resume_data semantics to make more sense (breaks
backwards compatibility of edge-cases)
* improve DHT bootstrapping and periodic refresh
* improve DHT maintanence performance (by pinging instead of full lookups)
* fix bug in DHT routing table node-id prefix optimization
* fix incorrect behavior of flag_use_resume_save_path
* fix protocol race-condition in super seeding mode
* support read-only DHT nodes
* remove unused partial hash DHT lookups
* remove potentially privacy leaking extension (non-anonymous mode)
* peer-id connection ordering fix in anonymous mode
* mingw fixes

* added missing force_proxy to python binding
* anonymous_mode defaults to false
* make DHT DOS detection more forgiving to bursts
* support IPv6 multicast in local service discovery
* simplify CAS function in DHT put
* support IPv6 traffic class (via the TOS setting)
* made uTP re-enter slow-start after time-out
* fixed uTP upload performance issue
* fix missing support for DHT put salt

* fix alignment issue in bitfield
* improved error handling of gzip
* fixed crash when web seeds redirect
* fix compiler warnings