Start of wakeup-time advice.
Fixes sorting for consistent2 metric
Merge branch 'master' of github.com:sleepers-anonymous/zscore
Fixes leaderboard sorting.
Fixes robots meta tag, declares charset
Merge branch 'master' of https://github.com/sleepers-anonymous/zscore
Adds caching infrastructure.

In particular, adds the caching decorator @cache_function(), adds the
app cache, converts the existing caching to use the decorator, and adds
some caching utils.
Minor performance improvements to /friends/.
Allow us to deactivate sleeps.
Merge branch 'master' of https://github.com/sleepers-anonymous/zscore
Merge branch 'master' into groups