Update cookoo version pin from 1.2 to 1.3.

Turns out we're using the newer logger.

Author: technosophos

glide.yaml

@@ -4,7 +4,7 @@ import:
   - package: k8s.io/kubernetes
     version: ~1.1
   - package: github.com/Masterminds/cookoo
-    version: >=1.2.0
+    version: ">=1.3.0"
   - package: github.com/coreos/etcd/client
   - package: golang.org/x/net/context
   # Fix problemms with k8s' vendored repos