Small update to rdzr.co pushed

I just pushed a small update to http://rdzr.co that improves error handling, uuid-collisions, and, more importantly, it now has reverse lookup (which can be helpful if you don't trust a rdzd URL). To do so, simply add '/reverse' to the suspect URL.

For example:
You see http://rdzr.co/xyz in a friend's post, but you know the person is a well-known RickRoller so, to foil his or her nefarious plans you simple copy and paste the URL into your browser's location bar, and append /reverse at the end of the URL (i.e. http://rdzr.co/xyz/reverse). WAM. Crisis averted.