MIME type; except/permit naming

While we're doing reviews of TPE to prepare for Last Call, I've come across a couple of potential changes: both have been discussed before, but not yet made to the draft, I believe. (I've sent these to the editors for their review, but maybe we can all discuss on a teleconference or get feedback in email.)

## MIME type

Should we define a MIME type for the tracking status resource? When I did a little sample implementation of my own, I think I was just using application/json, but I've heard that we should define something specific in the document.

Suggestion: define MIME type "application/tracking-status" (or similar) to be used for the tracking status resource.

## naming of user-granted exceptions

Although we opened it up on the Compliance product, this issue about naming is actually as much or more relevant to the TPE. Specifically, since "exceptions" are not errors/exceptions and might not be exceptional to a general preference, should we call these "user-granted permissions" instead of "user-granted exceptions"?
http://www.w3.org/2011/tracking-protection/track/issues/212

This wouldn't change any functional, just a find-and-replace with the name throughout, but I've heard it come up a couple of times and if we want to change this, doing so before Last Call will make public reviews/comments easier.

—Nick