Base for Signer Websockets server (#1158)

* Basic signing queue

* Adding docs

* WebSockets server for signer

* Removing TODO

* Shortening the syntax

* Exposing types from RPC

* Fixing indentation

* Update main.rs

dapps/src/lib.rs

@@ -34,9 +34,9 @@
 //! 	let io = IoHandler::new();
 //! 	io.add_method("say_hello", SayHello);
 //! 	let _server = Server::start_unsecure_http(
-//!		&"127.0.0.1:3030".parse().unwrap(),
-//!		Arc::new(io)
-//!	);
+//! 		&"127.0.0.1:3030".parse().unwrap(),
+//! 		Arc::new(io)
+//! 	);
 //! }
 //! ```
 //!