Rename "kube-peers" to "kube-utils"

It's now doing things like network status that are outside of the
scope of "peers".

.gitignore

@@ -46,8 +46,8 @@ prog/weavewait/weavewait_noop
 prog/weavewait/weavewait_nomcast
 prog/weaveutil/weaveutil
 prog/*/Dockerfile.weaveworks
-prog/kube-peers/kube-peers
-prog/weave-kube/kube-peers
+prog/kube-utils/kube-utils
+prog/weave-kube/kube-utils
 prog/weave-npc/weave-npc
 prog/plugin/plugin
 testing/cover/cover