Update Firebase to v3

[kevinkace]

https://firebase.google.com/support/guides/firebase-web

[tivac]

Free for the taking, will be a bit before I can get to it!

[tivac]

Working on this in the firebase-3 branch.

[tivac]

TODO

• Figure out how to make auth work w/ my current route wrapper
• Make sure JWT auth still works
• Probably implement FB/GOOG auth while I'm in there

[tivac]

Adjusting scope, because it'll require some non-trivial changes to JsSrv to support the higher encryption requirements in Firebase@3's JWT implementation.