Adds privacy policy
Slight reformats of privacy policy, etc.
Adds footer, links privacy policy to it.
Moves feedback to footer
Makes footer float all the way to the bottom on mysleep.
Adds that we can change the privacy policy without notice
Merge branch 'master' of https://github.com/sleepers-anonymous/zscore
Adds privacy policy paragraphs about the NSA and passwords.
Generates leaderboard and stats_table more intelligently
Merge branch 'leaderboard'

Conflicts:
	zscore/templates/leaderboard.html
Minor changes to leaderboard template.\nValidation and consistency.
Merge branch 'master' of github.com:benjaminjkraft/zscore
Merge branch 'master' into groups