Updated to 2.0.0

Please be aware that this change also removes the curl based user registration. This was more of a bugfixing thing but ended up removing behavior (not the intention). Also, having that breaks the scriptability of the `brew install tokumx-bin` command. 
I would want to recommend the repo owner to keep that in mind and probably come up with some other way of making people register - I just can't think of one at the moment.
Sorry, we need to keep this part.  What was the problem with curl?  It wasn't escaping the parentheses is the user agent string homebrew added?