in peer fixed an issue with cancel and block happenign around the same time.
Merge branch 'master' of https://github.com/jtakkala/tulva
Added the totalLength argument for PeerManager, which is needed to know the size of the last piece
Fixed a bug that was preventing the download and confirmation of the last piece
Added a flashy ASCII banner in the log when the last piece finished.
Merge remote-tracking branch 'origin/master' into writer

Conflicts:
	peer.go