Merge pull request markedjs#1221 from styfle/badges

Add badges to README

README.md

@@ -4,6 +4,12 @@
 
 # Marked
 
+[![npm](https://img.shields.io/npm/v/marked.svg)](https://www.npmjs.com/package/marked)
+[![gzip size](http://img.badgesize.io/https://cdn.jsdelivr.net/npm/[email protected]/marked.min.js?compression=gzip)](https://cdn.jsdelivr.net/npm/[email protected]/marked.min.js)
+[![install size](https://packagephobia.now.sh/[email protected])](https://packagephobia.now.sh/[email protected])
+[![downloads](https://img.shields.io/npm/dt/marked.svg)](https://www.npmjs.com/package/marked)
+[![travis](https://travis-ci.org/markedjs/marked.svg?branch=master)](https://travis-ci.org/markedjs/marked)
+
 - ⚡ built for speed
 - ⬇️ low-level compiler for parsing markdown without caching or blocking for long periods of time
 - ⚖️ light-weight while implementing all markdown features from the supported flavors & specifications