Actually, the message format is LLSD notation not python (d'oh)

lib/classes/llsd/LLSDTokenContainer.ts

@@ -0,0 +1,9 @@
+import { LLSDToken } from './LLSDToken';
+import { LLSDTokenGenerator } from './LLSDTokenGenerator';
+
+export interface LLSDTokenContainer
+{
+    tokens: LLSDToken[];
+    index: number;
+    gen: LLSDTokenGenerator;
+}