Editorial, changed some text that talks about MediaStream's to MediaStreamTrack's.
Fixed some respec errors. The "Duplicate definition of 'track'" remains though.
More edits associated with moving from sending streams to sending tracks.
Fixed (hopefully) the link error spotted by Adam when reviewing PR #40.
Merge pull request #40 from stefhak/doohickey

Updated to use MediaStreamTrack instead of MediaStream.

I'm merging this to the doohickey branch, so that work can continue there.