Inconsistent behavior with REST 403/500 errors

[cgmartin]

Seeing odd behavior in Sails v0.9.8 when throwing 500 application errors, and when 403 forbidden errors are triggered from policy configurations where a controller/action is false. The results are not consistent between Socket and HTTP modes. More research is needed.

To reproduce,

1. Visit http://localhost:1337/rest-examples.
2. Click the HTTP and Socket buttons for 403: Forbidden and 500: Internal Server Error
3. Compare the results.

[cgmartin]

Fixed the inconsistency in 500 errors with commit 60d6321 but 403 errors are still an issue.