JSON responses are not cached

[eduardoboucas]

According to this, cached images are not used if the output is JSON. Unless there's a reason for this that I'm missing, we should be able to cache JSON responses in the same way we cache image streams.

What do you think @jimlambie?

[jimlambie]

I agree 100% - there are a couple of things we should revisit in the caching space for CDN.