add logo - fixes #327

README.md

 # node-sass
 
+![logo](https://rawgit.com/andrew/node-sass/master/media/logo.svg)
+
 [![Build Status](https://secure.travis-ci.org/andrew/node-sass.png?branch=master)](https://travis-ci.org/andrew/node-sass)
 [![NPM version](https://badge.fury.io/js/node-sass.png)](http://badge.fury.io/js/node-sass)
 [![Dependency Status](https://david-dm.org/andrew/node-sass.png?theme=shields.io)](https://david-dm.org/andrew/node-sass)

media/logo.svg

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