Update README.md

README.md

@@ -1,12 +1,13 @@
 # Flight Designator
-[![npm](https://img.shields.io/npm/v/flight-designator.svg?style=flat-square)](https://npmjs.com/flight-designator)
-[![npm downloads](https://img.shields.io/npm/dm/flight-designator.svg?style=flat-square)](https://npmjs.com/flight-designator)
+[![npm](https://img.shields.io/npm/v/flight-designator.svg?style=flat-square)](https://npmjs.com/package/flight-designator)
+[![npm license](https://img.shields.io/npm/l/flight-designator.svg?style=flat-square)](https://npmjs.com/package/flight-designator)
+[![npm downloads](https://img.shields.io/npm/dm/flight-designator.svg?style=flat-square)](https://npmjs.com/package/flight-designator)
 [![build status](https://img.shields.io/travis/jhermsmeier/node-flight-designator.svg?style=flat-square)](https://travis-ci.org/jhermsmeier/node-flight-designator)
 
 ## Install via [npm](https://npmjs.com)
 
 ```sh
-$ npm install flight-designator
+$ npm install --save flight-designator
 ```
 
 ## Usage
@@ -15,26 +16,43 @@ $ npm install flight-designator
 var FlightDesignator = require( 'flight-designator' )
 ```
 
+```js
+FlightDesignator.isValidAirlineCode( 'KLM' )
+> true
+```
+
+```js
+FlightDesignator.isValidFlightNumber( '0180' )
+> true
+```
+
 ```js
 FlightDesignator.parse( 'U24511A' )
 > {
   airlineCode: 'U2',
-  flightNumber: '4511',
+  flightNumber: 4511,
   operationalSuffix: 'A'
 }
 ```
 
+```js
+FlightDesignator.format( 'u2 0350A' )
+> 'U2350A'
+FlightDesignator.format( 'u2 0350A', true )
+> 'U2 350 A'
+```
+
 ```js
 new FlightDesignator( 'KLM', '645' )
 > {
   airlineCode: 'KLM',
-  flightNumber: '645',
+  flightNumber: 645,
   operationalSuffix: ''
 }
 ```
 
 ```js
-var flight = new FlightDesignator( 'LH', '2054', 'X' )
+var flight = new FlightDesignator( 'LH', 2054, 'X' )
 flight.toString()
 > 'LH2054X'
 flight.toString( true )