Use SVG version of the Travis CI badge

Author: astorije

README.md

@@ -1,6 +1,6 @@
 # UI-Grid : An AngularJS data grid
 
-[![Build Status](https://api.travis-ci.org/angular-ui/ui-grid.png?branch=3.0)](https://travis-ci.org/angular-ui/ui-grid)
+[![Build Status](https://travis-ci.org/angular-ui/ui-grid.svg?branch=master)](https://travis-ci.org/angular-ui/ui-grid)
 [![Coverage Status](https://coveralls.io/repos/github/angular-ui/ui-grid/badge.svg?branch=master)](https://coveralls.io/github/angular-ui/ui-grid?branch=master)
 [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/angular-ui/ui-grid?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 [![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)