Shopify/batman — pull request #710 by hutchike (2013-05-10 15:08:17+00:00)
Title: OK, have updated coffeescript and js to fix a bug where "root" is required to be a string

When "root" was left as null, the error I got was:

```
path.js:360
throw new TypeError('Arguments to path.join must be strings');
^
TypeError: Arguments to path.join must be strings
at path.js:360:15
at Array.filter (native)
at exports.join (path.js:358:36)
at Function.exports.send (/usr/lib/node_modules/batman/node_modules/connect/lib/middleware/static.js:141:20)
at send (/usr/lib/node_modules/batman/tools/utils.js:102:38)
at /usr/lib/node_modules/batman/tools/utils.js:126:26
at Object.oncomplete (fs.js:107:15)
```