Use SVG for status badges in README

http://shields.io/ provides many standardized badges for OSS. The PNG versions provided by Shields are similar to the images currently used, but the SVG versions added here are more legible on high pixel density displays.

Inch Pages themselves provide a SVG badge, so use it!

1 files changed, 3 insertions, 2 deletions

diff --git a/README.md b/README.md
index 19b26368..53493513 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
-[![Build Status](https://secure.travis-ci.org/pry/pry.png)](http://travis-ci.org/pry/pry) [![Code Climate](https://codeclimate.com/github/pry/pry.png)](https://codeclimate.com/github/pry/pry)
-[![Inline docs](http://inch-pages.github.io/github/pry/pry.png)](http://inch-pages.github.io/github/pry/pry)
+[![Build Status](https://img.shields.io/travis/pry/pry.svg)](https://travis-ci.org/pry/pry)
+[![Code Climate](https://img.shields.io/codeclimate/github/pry/pry.svg)](https://codeclimate.com/github/pry/pry)
+[![Inline docs](http://inch-pages.github.io/github/pry/pry.svg)](http://inch-pages.github.io/github/pry/pry)
 
 <center>
 ![The Pry Logo](https://dl.dropbox.com/u/26521875/pry%20stuff/logo/pry_logo_350.png)