Cleanup whitespace.
Change: return synchronously from queue.

When gathering statistics about the queue, many of the calculations are
synchronous. In these cases it makes sense to return the values
synchronously as well.

Add: slow thresholds as needed by tests.

Change: increase test cookie expiration date year so tests pass.
Bugfix: set globalAgent.maxSockets.

When setting maxConcurrency, the crawler is still restricted by node's
globalAgent.maxSockets setting. This commit sets globalAgent.maxSockets
to be the same as crawler.maxConcurrency.
Change: add missing semicolon.
Updated package.json. Tweaked aspects of previously merged code.