Reading JSON metadata files as UTF-8

I've recently used Berkshelf to install some cookbooks and it just so happens that the 'iis' cookbook's metadata contained some non-ascii characters (specifically, some sort of apostrophe).

This solved the issue, and does not seem to cause any harm (which is not overly surprising).

I'll admit I did not have time to figure out if this needs to go elsewhere, so I'm open to suggestions.