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.
Please try to add newlines to the end of textfiles. Reason is that Unix tools handle files that are not terminated by a newline different than the ones terminated by a newline. Git even warns you in a diff (`No newline at end of file`)

A good read is http://stackoverflow.com/questions/729692/why-should-files-end-with-a-newline regarding that topic