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 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
Collect .torrents if we have metadata but not .torrents associated to
it.
Fix for duplicate download anon_test
Fixed FastI2I no more \r\n removal
Merge pull request #661 from NielsZeilemaker/fix_fasti2i

Fixed FastI2I no more \r\n removal
Merge pull request #657 from NielsZeilemaker/swift_roothash_fix

Collect .torrents if we have metadata but not .torrents associated
fix swift TUNNELRECV data and length inconsistency problem
Merge pull request #659 from LipuFei/fix-swift-tunnelrecv

Fix swift TUNNELRECV data and length inconsistency problem
Fix speed graph
Improved logging of SwiftProcess