Lets users to choose which metrics to display
Fix to user metric choices for anonuser.
Replaces Sleeperprofile.objects.get(user=user) with user.sleeperprofile in a couple of places.
Fixes leaderboard sorting
Starts app sheeple

This will be a candybox-style game, where there are some things you get
by sleeping.
Fix fourier stuff; uses autocorrelation now.
Uses deviations for fourier thing.
Fixes to fixes to autocorrel stuff.

It's fixes all the way down.
Limit autocorrelation to shorter modes.
Changes autocorrel calculation a bit for missing data.
More messing around with autocorrelation.
More messing around with autocorrelation.
Fixes bug with simple sleep creation.
Adds new server message.
Fixes 500 on blank username for registration
Adds check for a dry run in migration 0020
Adds an anonymous user check
Replaces anonymous check with the preferred is_authenticated
Fixes bug where user entering a nonexistent date causes 500 errors
Fixes creep-as-other on yourself.