CSRF token to headers for AJAX POST. Fix for #113

This is how you do a JS post with the CSRF Protection

```
$.ajax({
url: "http://test.com",
type:"post"
headers: {'X-CSRF-Token': $('meta[name="csrf-token"]').attr('content')}})
```

views/layout.jade

@@ -5,6 +5,7 @@ html
     meta(http-equiv='X-UA-Compatible', content='IE=edge')
     meta(name='viewport', content='width=device-width, initial-scale=1.0')
     meta(name='description', content='')
+    meta(name='csrf-token', content=token)
     meta(name='author', content='')
     title #{title} | Hackathon Starter
     != css('styles')