R1:44bbdec9acfa

Improve elasticsearch

Summary: I thought that this will be fun but the elasticsearch API is horrible and the documentation is poor.

Test Plan:
Search for:

- string
- author
- author, owner
- string, author
- open
- string, open, author
- string, exclude
- several authors, several owners
- nothing
- probably all other combinations

Normally, such an exhaustive test plan wouldn't be required but each combination requires a completely different query.

Reviewers: epriestley, jungejason

Reviewed By…