Merge pull request #18 from wokalski/codecov-readme

Adds codecov badge to readme

Author: wokalski

.travis.yml

@@ -1,6 +1,10 @@
 osx_image: xcode8.2
 language: objective-c
 
+branches:
+  only: 
+    - master
+
 before_install:
     - gem install cocoapods # Since Travis is not always on latest version
     - gem install xcpretty

README.md

@@ -1,4 +1,6 @@
 [![Build Status](https://travis-ci.org/wokalski/Diff.swift.svg?branch=master)](https://travis-ci.org/wokalski/Diff.swift)
+[![codecov](https://codecov.io/gh/wokalski/Diff.swift/branch/master/graph/badge.svg)](https://codecov.io/gh/wokalski/Diff.swift)
+
 
 # Diff.swift