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

Cargo.toml

@@ -29,6 +29,9 @@ prettytable-rs = "0.7"
 log = "0.4"
 linefeed = "0.5"
 semver = "0.9"
+rustyline = "6"
+colored = "1.6"
+lazy_static = "1"
 
 grin_wallet_api = { path = "./api", version = "3.1.0-beta.1" }
 grin_wallet_impls = { path = "./impls", version = "3.1.0-beta.1" }