Wallet Interactive-mode, Part 1 (#295)

* cli addition to yml

* first experiments with CLI mode

* rustfmt

* modify owner_single_use to take optional instantiated API

* refactor command functions to take owner api instance

* modify commands to use single owner api instance

* add ability to pass customised message handler to API

* prevent update wallet attempt if wallet hasn't been opened

* fix output when internal updater is running

* add termion, use cli for status updates, remove logging output from CLI

* some attempts to clean up the command prompt and accomodate scanning intervals

* rework listener slightly to allow for cli mode, add close command

* remove termion dependency

controller/src/error.rs

@@ -104,6 +104,10 @@ pub enum ErrorKind {
 	#[fail(display = "{}", _0)]
 	ArgumentError(String),
 
+	/// Other
+	#[fail(display = "Listener Startup Error")]
+	ListenerError,
+
 	/// Other
 	#[fail(display = "Generic error: {}", _0)]
 	GenericError(String),