use shields.io badges throughout

Author: trevj

README.md

@@ -1,7 +1,7 @@
 [![NPM version](https://img.shields.io/npm/v/uproxy-lib.svg)](https://www.npmjs.com/package/uproxy-lib)
-[![Build Status](https://travis-ci.org/uProxy/uproxy-lib.svg?branch=master)](https://travis-ci.org/uProxy/uproxy-lib)
-[![Build Status](https://api.shippable.com/projects/54c823bf5ab6cc135289fbd8/badge?branchName=dev)](https://app.shippable.com/projects/54c823bf5ab6cc135289fbd8/builds/latest)
-[![devDependency Status](https://david-dm.org/uProxy/uproxy-lib/dev-status.svg)](https://david-dm.org/uProxy/uproxy-lib#info=devDependencies)
+[![Travis build status](https://img.shields.io/travis/uProxy/uproxy-lib.svg)](https://travis-ci.org/uProxy/uproxy-lib)
+[![Shippable build status](https://img.shields.io/shippable/54c823bf5ab6cc135289fbd8.svg)](https://app.shippable.com/projects/54c823bf5ab6cc135289fbd8)
+[![dependency status](https://img.shields.io/david/dev/uProxy/uproxy-lib.svg)](https://david-dm.org/uProxy/uproxy-lib#info=devDependencies)
 
 Obfuscating, WebRTC-driven SOCKS proxy and other utilities for [uProxy](https://www.uproxy.org/).