Merge pull request #6 from blakeembrey/patch-1

Show usage with syntax highlighting

Author: woodyrew

Readme.md

@@ -29,14 +29,16 @@
 
 ```js
 var markdown = require('metalsmith-markdown');
+var highlighter = require('highlighter');
 
 metalsmith.use(markdown({
   smartypants: true,
   gfm: true,
-  tables: true
+  tables: true,
+  highlight: highlighter()
 }));
 ```
 
 ## License
 
-  MIT
+  MIT