README: add engine.swarm.downloadSpeed() and clarify engine.swarm.downloaded #173
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There's 2 parts to this pull request. The first one should be straight forward - "Add engine.swarm.downloadSpeed()" to the documentation
The second is a clarification. From my tests,
torrent-stream
always ends up downloading more than thetotalLength
and henceengine.swarm.downloaded
isnt a good metric to figure out what's left. In other words, trying to do a "%" byengine.swarm.downloaded/totalLength
always goes above 100%.