[doc] Added some installation notes and link's to the documentation

README.md

@@ -4,6 +4,32 @@ Creditcard number parsing, validation and information extraction. The source
 code has been commented using JSDoc and converted to documentation which can be
 found in the `docs` folder.
 
+## Installation
+
+The module is available in the NPM registery. It can be installed using the
+`npm` commandline utlity.
+
+```
+npm install creditcard
+```
+
+Once you have installed the module you can simply require inside of your Node.js
+application and use it's exported methods.
+
+```js
+var creditcard = require('creditcard');
+
+creditcard.validate(4111111111111);
+```
+
+## Documentation
+
+The documentation of this module has been automatically generated from the
+JSDocs that is used to comment the source code. It should give a clear
+understanding of the methods that are available in this module and how it should
+be used. The documentation can be found in the [**docs
+folder**](https://github.com/observing/creditcard/tree/master/docs)
+
 ### License (MIT)
 
 Copyright (c) 2012 Observe.it (http://observe.it) <opensource@observe.it>