Added dependency libssl-dev and removed comma behind python-pyasn1
fix Windows build scripts
remove unused method TorrentDef.retrieve_from_magnet_infohash()
change some objects to use super()
some small changes
fix for get torrent from magnet link
add lock for FastI2I
Merge pull request #652 from rjruigrok/patch-1

Added dependency libssl-dev and removed comma behind python-pyasn1
Merge pull request #649 from LipuFei/fix-win-build

fix Windows build scripts
add debug
update comments
Merge pull request #653 from LipuFei/fix-get-from-magnet

Fix get torrent from magnet problem
Merge pull request #654 from LipuFei/trace-dup-swifttorhash

Trace duplic swift torrent hash problem
Use returnvalue of SwiftDef finalize, log error if roothash could not be
computed
Fixed return of finalize
Merge pull request #656 from NielsZeilemaker/swift_roothash_fix

Use returnvalue of SwiftDef finalize, log error if roothash could not be
fix swift TUNNELRECV data and length inconsistency problem