Added backend.

src/lib.rs

@@ -1,3 +1,4 @@
+mod backend;
 mod client;
 mod data;
 mod error;
@@ -468,7 +469,7 @@ impl MoreThanText {
          * tx = Queue::start();
          * tx.send(Session::start().into()).unwrap();
          * Self { tx: tx }
-        */
+         */
         let (tx, rx) = channel();
         let mut senders = Vec::new();
         senders.push(Client::start(tx.clone()));