Cache

[karniewski]

I added some caching, the Explore view should be much faster now.

The cache is configured with a simple in-memory backend for now, but for production we must switch to something better, e.g. Memcached or Redis.

[tiagosimoes-euf]

This would be great, but we don't yet have support for either on our servers.
Let me look into Redis and see if I can get it running properly.

[karniewski]

So maybe just for now we add only cache-control? That does not require any additional services on the server.

[tiagosimoes-euf]

We will need Redis anyway, because at some point this resource will start getting some serious use.
I'm sure this can wait until early next week, at which point we will have the Redis support covered and we move forward with the whole caching strategy.