Upgrade to kew@0.5.0-alpha

Hello @nicks, @x-ma, @sboora, @eford1, 

Please review the following commits I made in branch 'nathan-kew'.

a1494d0ef4a17c063225511ea86f4cd89276347f (2014-09-29 10:52:53 -0700)
Upgrade to kew@0.5.0-alpha

R=@nicks
R=@x-ma
R=@sboora
R=@eford1