Update README.md

Author: pboyd04

README.md

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 # CSDLParser
-========
 
 [![Build Status](https://travis-ci.org/pboyd04/CSDLParser.svg?branch=master)](https://travis-ci.org/pboyd04/CSDLParser)
 [![Dependency Status](https://david-dm.org/pboyd04/CSDLParser.svg)](https://david-dm.org/pboyd04/CSDLParser)
+
+---
+
+## Installation
+
+This module is installed via npm:
+
+```
+npm install --save CSDLParser
+```
+
+## Description
+
+This module provides a simple interface to parse [Common Schema Definition Language](http://docs.oasis-open.org/odata/odata/v4.0/odata-v4.0-part3-csdl.html) (CSDL) files as defined by the OData v4 specification. This module was originally written to provide a more comprehensive test suite for projects utilizing CSDL for typing, but could also be used by OData clients to obtain type information.