Add FAQ to site

[peterramsing]

There are a fair amount of similar questions that get asked.

[japick]

I can handle this one.

[peterramsing]

@japick You're awesome!

[japick]

@peterramsing Do we have a compiled list of FAQs?

[peterramsing]

@japick Let me come up with some. I think this might replace the "Gotchas" section.

The one that triggered me to make this ticket was:

TypeError: Cannot read property 'split' of undefined as an output. See this issue: peterramsing/lost#268 (Whenever I get asked this question it turns out to be the SCSS transpilation.