Add coverage badge

SMillerDev · web-flow · commit 0442c9591347 · 2017-10-16T13:56:39.000+02:00
diff --git a/README.md b/README.md
@@ -1,4 +1,4 @@
-# PHPDraft [![Build Status](https://travis-ci.org/SMillerDev/phpdraft.svg?branch=master)](https://travis-ci.org/SMillerDev/phpdraft) [![Style Status](https://styleci.io/repos/65147997/shield)](https://styleci.io/repos/65147997)
+# PHPDraft [![Build Status](https://travis-ci.org/SMillerDev/phpdraft.svg?branch=master)](https://travis-ci.org/SMillerDev/phpdraft) [![Style Status](https://styleci.io/repos/65147997/shield)](https://styleci.io/repos/65147997) [![codecov](https://codecov.io/gh/SMillerDev/phpdraft/branch/master/graph/badge.svg)](https://codecov.io/gh/SMillerDev/phpdraft)
 This is a parser for API Blueprint files in PHP.[1](#dependencies)
 
 ## Usage

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`1`		`-# PHPDraft [![Build Status](https://travis-ci.org/SMillerDev/phpdraft.svg?branch=master)](https://travis-ci.org/SMillerDev/phpdraft) [![Style Status](https://styleci.io/repos/65147997/shield)](https://styleci.io/repos/65147997)`
	`1`	`+# PHPDraft [![Build Status](https://travis-ci.org/SMillerDev/phpdraft.svg?branch=master)](https://travis-ci.org/SMillerDev/phpdraft) [![Style Status](https://styleci.io/repos/65147997/shield)](https://styleci.io/repos/65147997) [![codecov](https://codecov.io/gh/SMillerDev/phpdraft/branch/master/graph/badge.svg)](https://codecov.io/gh/SMillerDev/phpdraft)`
`2`	`2`	`This is a parser for API Blueprint files in PHP.[1](#dependencies)`
`3`	`3`
`4`	`4`	`## Usage`