Use svn badges supported by travis

README.md

@@ -1,6 +1,6 @@
 # ruby-dmm
 [![Gem Version](https://img.shields.io/gem/v/ruby-dmm.svg)](http://badge.fury.io/rb/ruby-dmm)
-[![Build Status](https://img.shields.io/travis/meganemura/ruby-dmm.svg)](https://travis-ci.org/meganemura/ruby-dmm)
+[![Build Status](https://travis-ci.org/meganemura/ruby-dmm.svg?branch=master)](https://travis-ci.org/meganemura/ruby-dmm)
 [![Coverage Status](https://img.shields.io/coveralls/meganemura/ruby-dmm.svg)](https://coveralls.io/r/meganemura/ruby-dmm?branch=master)
 [![Code Climate](https://img.shields.io/codeclimate/github/meganemura/ruby-dmm.svg)](https://codeclimate.com/github/meganemura/ruby-dmm)
 [![Dependency Status](https://img.shields.io/gemnasium/meganemura/ruby-dmm.svg)](https://gemnasium.com/meganemura/ruby-dmm)