Merge pull request #2613 from jbeda/release-0.5

Mark v0.5.4 with Docker 1.3.2
binary release -> binary release of kubernetes
Merge pull request #2616 from kmerker/patch-1

binary release -> binary release of kubernetes
Add some backward compatability for GKE.

(cherry picked from commit b07515c5ea63624485fb8058c251cd4055a336f0)
Add 0.5.5
Add 0.5.5-dev
Merge pull request #2721 from brendandburns/release-0.5

Release 0.5
Move salt based clusters to Docker 1.3.3

Part of #2896

(cherry picked from commit c9acafc98a3621d05901db54e28443b9d8801b2c)
Kubernetes version v0.5.6
Kubernetes version v0.5.6-dev