Added very basic pagination.

Fixes #22.
sort queue in chronological order, history in reverse chronological.
added pagination tests for submission-list.html.
added more examples to docs, made <h3> in docs hyperlinkable.
oops, 'example request' -> 'example input'
Validate that review response is in list of canned responses, if present.
added test to ensure that canned responses validate.
removed a resolved todo.
removed another resolved TODO.
Log error and exit if test suite is unable to connect to mongodb.

Instead of just hanging on a test that uses the db, which is quite
perplexing.
added email validator.
Split validators out into their own module and gave them tests.
added static/vendor/stubbyid.js.
Added support for the stubbyid persona simulator.