canboatjs 2.0 release

[sbender9]

I have released canboatjs v2.0, this is a pretty big change and is based on the data from the latest version of canboat (5.0).

We will eventually update the signal server to use this, but it won't pick it up yet.

If you're using canboatjs outside of the sk server, I'd appreciate if you could give it try!