New Query Options tray added

For scope, see: https://issues.apache.org/jira/browse/COUCHDB-2347

Two important things to mention:
1. The "Compact View" button has been removed. I want to discuss with @seanbarclay about whether it should really appear in the tray.
2. There's an outstanding issue (outside this ticket) where the header bar doesn't always show the correct content when navigating from page to page.
Originally it was helpful, I agree, but the new UI greys out the "Include as Docs" checkbox label so it's visually very clear what's going on when you check the Reduce checkbox. Seemed overkill to show the (rather intrusive) notification. I *think* I persuaded @seanbarclay that this was okay. :)