Rename repo

[ThirteenFish]

The FCF isn't actually specific to AV3. The name should reflect that.

[natronics]

The 'right' thing here is probably to make a new correctly named repo, like flight-software or whatever. Push the current master to that repo, the revert this one to L-10 tag. Put in cold storage.

[thorsummoner]

Just a heads up, Github's blog post references this repo's name space. Just FYI

[wicker]

We're on their favorite science projects list as well. When we do this, we should ask them to change the links.