Change Badge from interface to namespace

[marcoscaceres]

closes #9
closes #14

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[fallaciousreasoning]

This LGTM :)

[marcoscaceres]

@domenic, this is my first ever attempt at defining a namespace 🐣... anything else we would need to spec that's different from an interface definition?

[domenic]

Still needs [Exposed].

[marcoscaceres]

Ah, yeah of course. Added Exposed back.

[domenic]

LGTM, although I would also change all "X method"s to "X function"s. (Both are Web IDL "operations", but you are doing the nice thing for web devs and using the normal JavaScript name, which with this change would now be function.)

[marcoscaceres]

I wondered about that... I was mostly following the naming form the console API, which calls them "methods". Don't feel strongly about changing it, but my working assumption is: if the operations attached to an object, then it's a "method" on that object. Otherwise, it's a standalone operations, so it's a "function".

[domenic]

Good point, we should fix console. (Methods are this dependent, but the functions attached to namespaces are not this dependent.)

[marcoscaceres]

Sounds good. I'll update this PR.

[fallaciousreasoning]

Feel free to merge :)