Add a status endpoint to the server.

This pull request adds a status endpoint to the Red October server; as
of this pull request, the status endpoint only returns the current
delegation persistence state. The HTTP UI has not been updated, as
this is scoped out for a future request; however, the CLI utility now
features a status command to fetch this information.

client/client.go

@@ -372,3 +372,18 @@ func (c *RemoteServer) OrderCancel(req core.OrderInfoRequest) (*core.ResponseDat
 
 	return unmarshalResponseData(respBytes)
 }
+
+// Status returns the current delegation persistence state from the remote server.
+func (c *RemoteServer) Status(req core.StatusRequest) (*core.ResponseData, error) {
+	reqBytes, err := json.Marshal(req)
+	if err != nil {
+		return nil, err
+	}
+
+	respBytes, err := c.doAction("status", reqBytes)
+	if err != nil {
+		return nil, err
+	}
+
+	return unmarshalResponseData(respBytes)
+}