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.
oh cool. might I suggest adding the ability to pass the email as a commandline flag? `--email foo@bar.com` and making that a required thing.