clean code

Change-Id: Ibc725ae2c1d0e9c4cf8de45e7ce46ae5353c4bbf
Merge branch 'master' of ssh://pomelo.com:29418/pomelo
support stream2 in node 0.10.x

Change-Id: Ie47efba45258ce211d3d7ccff774e34d5436b351
Merge "support stream2 in node 0.10.x"