Client key support.
Add API key enforcement.
Merge branch 'master' into apikeys
Merge branch 'master' into apikeys
Tweak static file serving.
Merge branch 'master' into apikeys
Switch over to using the lightauth key-checking implementation instead of the hack TD-driven middleware.
Do a better job of guessing years and agencies on entity dockets if they're not set correctly; fixes sunlightlabs/brisket#17 and fixes sunlightlabs/brisket#26