Add FAQ section

[maraoz]

Some questions I guess many have:

• when does voting end? (the same day the law is voted in congress?)
• can I see the the actual voting results from congress?
• what law categories are there?
• why can't I see voting results before the voting ends?

And then, some general site explanation questions.

[gvilarino]

This is actually a good and simple addition to the platform.

Links to this section should be included both in the user drop-down as well as in inline, "learn more"-ish links (e.g.: next to the 'Closing at' label in a bill view). Maybe some of them also be answered inline so users arent redirected to some other page in order to learn.

[maraoz]

Agreed. You can always use target="_blank" in links to prevent the user losing context.

[gvilarino]

@maraoz right; we're doing that whenever we set links. Still, we try to prioritize inline, single-page approaches when possible. As, for example, in #344