Merge pull request #254 from aeroastro/feature/travis-badge-for-master

Migrate travis badge from PNG to SVG

Readme.md

@@ -1,7 +1,7 @@
 Parallel
 ==============
 [![Gem Version](https://badge.fury.io/rb/parallel.svg)](https://rubygems.org/gems/parallel)
-[![Build Status](https://travis-ci.org/grosser/parallel.png)](https://travis-ci.org/grosser/parallel)
+[![Build Status](https://travis-ci.org/grosser/parallel.svg?branch=master)](https://travis-ci.org/grosser/parallel)
 
 
 Run any code in parallel Processes(> use all CPUs) or Threads(> speedup blocking operations).<br/>