Sketch of copy streams in tm2. Refs #472.
Use speedometer to revive tiles/sec calc.
Close the tmp db before renaming.
Merge branch 'master' into tilelive-streams
Use master of tilelive.
Merge branch 'master' into tilelive-streams
Use tilelive 5.0.0
tv 2.0.0
Remove dupe test.
Merge pull request #476 from mapbox/tilelive-streams

tilelive streams