Change repo to generate both a library and a binary.

This repo will primary be a library, but for compliance testing it may make sense to have a binary operating in the same fashion as the node dustjs shim so I've set up this repo to generate both a library and a binary.

Cargo.toml

@@ -4,7 +4,13 @@ version = "0.1.0"
 authors = ["Tom Alexander <tom@fizz.buzz>"]
 edition = "2018"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[lib]
+name = "duster"
+path = "src/lib.rs"
+
+[[bin]]
+name = "duster-cli"
+path = "src/bin.rs"
 
 [dependencies]
 nom = { git = "https://github.com/tomalexander/nom.git", branch = "take_until_parser_matches" }