Use SVG versions for the badges

![image](http://f.cl.ly/items/420a072x290K1K2c1H3s/Screen%20Shot%202014-09-11%20at%206.09.46%20AM.png)

README.md

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 # [![MEAN Logo](http://www.mean.io/img/logos/meanlogo.png)](http://mean.io/) MEAN Stack
 
-[![Build Status](https://travis-ci.org/linnovate/mean.png?branch=master)](https://travis-ci.org/linnovate/mean)
-[![Dependencies Status](https://david-dm.org/linnovate/mean.png)](https://david-dm.org/linnovate/mean)
+[![Build Status](https://travis-ci.org/linnovate/mean.svg?branch=master)](https://travis-ci.org/linnovate/mean)
+[![Dependencies Status](https://david-dm.org/linnovate/mean.svg)](https://david-dm.org/linnovate/mean)
 
 MEAN is a boilerplate that provides a nice starting point for [MongoDB](http://www.mongodb.org/), [Node.js](http://www.nodejs.org/), [Express](http://expressjs.com/), and [AngularJS](http://angularjs.org/) based applications. It is designed to give you a quick and organized way to start developing MEAN based web apps with useful modules like Mongoose and Passport pre-bundled and configured. We mainly try to take care of the connection points between existing popular frameworks and solve common integration problems.