Add support for hash-bang (#!)-style tweet URLs

Twitter now uses the following format for tweets by default:

http://twitter.com/#!/[USERNAME]/status/[TWEET_ID]

This URL, which is in the default format, works with the twitter_blackbird module:

https://twitter.com/#!/tronathan/status/108714747402272768

But this URL, which is now the default format, does not:

https://twitter.com/tronathan/status/108714747402272768

The module should be updated to support the new format as well as the old.