Merged 0.5.3 hotfix release back to master

Conflicts:
	api.go
	commands.go
	network.go

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## 0.5.3 (2013-08-13)
+* Runtime: Use docker group for socket permissions
+- Runtime: Spawn shell within upstart script
+- Builder: Make sure ENV instruction within build perform a commit each time
+- Runtime: Handle ip route showing mask-less IP addresses
+- Runtime: Add hostname to environment
+
 ## 0.5.2 (2013-08-08)
  * Builder: Forbid certain paths within docker build ADD
  - Runtime: Change network range to avoid conflict with EC2 DNS

commands.go

@@ -27,7 +27,7 @@ import (
 	"unicode"
 )
 
-const VERSION = "0.5.2-dev"
+const VERSION = "0.5.3-dev"
 
 var (
 	GITCOMMIT string