Add mDNS discovery to the Fletch compiler

pkg/fletchc/lib/src/verbs/actions.dart

Index: pkg/fletchc/lib/src/verbs/actions.dart
diff --git a/pkg/fletchc/lib/src/verbs/actions.dart b/pkg/fletchc/lib/src/verbs/actions.dart
index bffc5cfce1d2f139a805899cb3bc575582c969b9..fa08f3f79cbe5bfb041fbfc3f59c96724534f0cd 100644
--- a/pkg/fletchc/lib/src/verbs/actions.dart
+++ b/pkg/fletchc/lib/src/verbs/actions.dart
@@ -22,6 +22,9 @@ import 'create_verb.dart' show
 import 'debug_verb.dart' show
     debugAction;
 
+import 'x_discover_verb.dart' show
+    discoverAction;
+
 import 'export_verb.dart' show
     exportAction;
 
@@ -117,6 +120,7 @@ const Map<String, Action> uncommonActions = const <String, Action>{
   "compile": compileAction,
   "create": createAction,
   "debug": debugAction,
+  "x-discover": discoverAction,
   "shutdown": shutdownAction,
   "x-end": endAction,
   "x-servicec": servicecAction,