added readme and comment on telemetry

src/bin/demo_handler_udp.rs

@@ -30,7 +30,7 @@ fn main() {
 
     let mode_on_tc = RuntimeTelecommands::Mode(Mode::On);
 
-    runtime.run_once(&mode_on_tc, &mut udp_interface);
+    runtime.run_once(&mode_on_tc, &mut udp_interface); // TODO return value of run_once is TM
 
     let demo_tc_1 = DemoTelecommands::FirstTelecommand(FirstTelecommandData { a_number: 13 });