send url metadata with amqp message so that umbra can send it back with child urls
use parent url metadata received via amqp in building CrawlURI
formatting change only - use 4 spaces to indent
pause amqp consumption on crawl pause, and resume on unpause
don't try to stop consuming amqp when crawl is shutting down, can end up reopening the connection after it's been closed
call the extra info we send to umbra "clientId", kinda clarifies the purpose of it
Merge pull request #39 from nlevitt/umbra

progress and formatting changes