.png -> .svg badges

README.md

@@ -1,9 +1,9 @@
 ![Celluloid](https://raw.github.com/celluloid/celluloid-logos/master/celluloid/celluloid.png)
 =========
-[![Gem Version](https://badge.fury.io/rb/celluloid.png)](http://rubygems.org/gems/celluloid)
-[![Build Status](https://secure.travis-ci.org/celluloid/celluloid.png?branch=master)](http://travis-ci.org/celluloid/celluloid)
-[![Code Climate](https://codeclimate.com/github/celluloid/celluloid.png)](https://codeclimate.com/github/celluloid/celluloid)
-[![Coverage Status](https://coveralls.io/repos/celluloid/celluloid/badge.png?branch=master)](https://coveralls.io/r/celluloid/celluloid)
+[![Gem Version](https://badge.fury.io/rb/celluloid.svg)](http://rubygems.org/gems/celluloid)
+[![Build Status](https://secure.travis-ci.org/celluloid/celluloid.svg?branch=master)](http://travis-ci.org/celluloid/celluloid)
+[![Code Climate](https://codeclimate.com/github/celluloid/celluloid.svg)](https://codeclimate.com/github/celluloid/celluloid)
+[![Coverage Status](https://coveralls.io/repos/celluloid/celluloid/badge.svg?branch=master)](https://coveralls.io/r/celluloid/celluloid)
 
 > "I thought of objects being like biological cells and/or individual
 > computers on a network, only able to communicate with messages"