Implement weave consense

weave

@@ -51,6 +51,8 @@ weave launch        <same arguments as 'weave launch-router'>
                       [--rewrite-inspect]
       launch-plugin [--no-multicast-route]
 
+weave consense
+
 weave env           [--restore]
       config
       dns-args
@@ -2186,6 +2188,9 @@ EOF
         echo "The 'stop-dns command has been removed; DNS is stopped as part of 'stop' and 'stop-router'." >&2
         exit 0
         ;;
+    consense)
+        call_weave GET /consensus
+        ;;
     *)
         echo "Unknown weave command '$COMMAND'" >&2
         usage