docs(README): *usage* added

README.md

@@ -10,7 +10,28 @@ This library contains a collection of tools to help interacting with json encode
    - A utility to filter lexical tokens which belong to keys that have null values.
      This makes easy to re-assemble json data streams and strip them off their null values.
 
+
+# Usage
+[![Build Status](https://travis-ci.org/Byron/json-tools.svg?branch=master)](https://travis-ci.org/Byron/json-tools)
+Add this to your *Cargo.toml*
+```toml
+[dependencies]
+json-tools = "*"
+```
+
+Add this to your lib ...
+```Rust
+extern crate json_tools;
+
+use json_tools::Lexer;
+
+for token in Lexer::new(r#"{ "face": "😂" }"#.chars()) {
+	println!("{:?}", token);
+}
+```
+
 # Motivation
 
 This library may possibly never grow bigger than the 2 features originally mentioned, as it was created
-as a workaround to missing features in [`serde`](https://github.com/serde-rs/serde).
+as a workaround to missing features in [`serde`](https://github.com/serde-rs/serde).
+