Allow Stream Records to be viewed via a secure feed

Resolves #62 

This creates a valid RSS feed of Stream Records, we should add support for JSON output later too.

@shadyvb Please review

Every user (whose role has been granted access via the Role Access setting) is given their own unique key which is seen while editing their profile. If their role is removed from access, then their feed URL will also become inactive.

![screen shot 2013-12-16 at 1 24 07 pm](https://f.cloud.github.com/assets/522158/1757969/ad41cb72-6687-11e3-91ed-29e8508de60c.png)