docs(readme) add badges

Author: coderaiser

README.md

@@ -1,4 +1,4 @@
-# Writejson
+# writejson [![License][LicenseIMGURL]][LicenseURL] [![NPM version][NPMIMGURL]][NPMURL] [![Dependency Status][DependencyStatusIMGURL]][DependencyStatusURL] [![Build 
 
 Write stringified object to file.
 
@@ -30,3 +30,12 @@ writejson.sync.try('data.json', {hello: 'world'});
 
 MIT
 
+[NPMIMGURL]:                https://img.shields.io/npm/v/writejson.svg?style=flat
+[BuildStatusIMGURL]:        https://img.shields.io/travis/coderaiser/writejson/master.svg?style=flat
+[DependencyStatusIMGURL]:   https://img.shields.io/gemnasium/coderaiser/writejson.svg?style=flat
+[LicenseIMGURL]:            https://img.shields.io/badge/license-MIT-317BF9.svg?style=flat
+[NPMURL]:                   https://npmjs.org/package/writejson "npm"
+[BuildStatusURL]:           https://travis-ci.org/coderaiser/writejson  "Build Status"
+[DependencyStatusURL]:      https://gemnasium.com/coderaiser/writejson "Dependency Status"
+[LicenseURL]:               https://tldrlegal.com/license/mit-license "MIT License"
+