cluster/tools: integrate kartongips as main kubecfg tool

Change-Id: If6a6c8e9c9163f0fc25adcaa8680857fdca69cd3
diff --git a/cluster/tools/kartongips/main.go b/cluster/tools/kartongips/main.go
index 11058b3..2dd10dd 100644
--- a/cluster/tools/kartongips/main.go
+++ b/cluster/tools/kartongips/main.go
@@ -24,11 +24,10 @@
 	"code.hackerspace.pl/hscloud/cluster/tools/kartongips/pkg/kubecfg"
 )
 
-// Version is overridden using `-X main.version` during release builds
-var version = "(dev build)"
+var Version = "unknown"
 
 func main() {
-	cmd.Version = version
+	cmd.Version = Version
 
 	if err := cmd.RootCmd.Execute(); err != nil {
 		// PersistentPreRunE may not have been run for early