Added read result to default policy allow for all nodes

policy.go

@@ -327,8 +327,9 @@ func (ext *ACLExt) Field(name string) interface{} {
 }
 
 var ErrorSignalAction = Action{"ERROR_RESP"}
+var ReadResultSignalAction = Action{"READ_RESULT"}
 var DefaultACLPolicies = []Policy{
-  NewAllNodesPolicy(Actions{ErrorSignalAction}),
+  NewAllNodesPolicy(Actions{ErrorSignalAction, ReadResultSignalAction}),
 }
 
 func NewACLExt(policies ...Policy) *ACLExt {

signal.go

@@ -276,6 +276,10 @@ type ReadResultSignal struct {
   Extensions map[ExtType]map[string]interface{} `json:"extensions"`
 }
 
+func (signal ReadResultSignal) Permission() Action {
+  return ReadResultSignalAction
+}
+
 func NewReadResultSignal(req_id uuid.UUID, node_type NodeType, exts map[ExtType]map[string]interface{}) ReadResultSignal {
   return ReadResultSignal{
     BaseSignal: BaseSignal{