Regex was wrong such that GetStatus and GetUser would both try to get an endpoint that didn't exist. The previous error catching failed, because an AttributeError was never raised when trying to get a rate limit for an endpoint that didn't exist. So GetStatus was looking for rate limit information re /statuses/show/123, but the URL that method calls is just /statuses/show.json and the status_id is a query parameter. Same basic idea for /users/show/456 v /users/show.json

This fixes that and amends the behavior to return a default rate limit object in the case that an endpoint is not found the first time around and then sets it the next time. This might cause some issues if Twitter consistently doesn't update their /application/rate_limit_status.json endpoint, but I think we should cross that bridge when we come to it.

This change is