Initial BeatStream support.

bst@asphyxia/models/utility/webui_message.ts

@@ -0,0 +1,14 @@
+import { ICollection } from "./definitions"
+
+export interface IWebUIMessage extends ICollection<"utility.webuiMessage"> {
+    message: string
+    type: WebUIMessageType
+    refid?: string
+    version: number
+}
+
+export enum WebUIMessageType {
+    info = 0,
+    success = 1,
+    error = 2
+}