Allow optional trailing slash on twitter URLs, and add support for video/photo urls
Allow optional trailing slash on twitter URLs, and add support for video/photo urls

Video/photo links do not need to be treated differently from standard links, since all photo/video links have their "canonical URL" set to the the raw "status" URL, so all we need to do is match them to the existing onebox.

discourse/onebox,discourse/onebox,techAPJ/onebox,techAPJ/onebox,techAPJ/onebox