Fixed #19 -- Added a password reset function and templates.  Also updated requirements.txt file to use Pillow over PIL
Fixes #28 -- Country World Rank is now displayed instead of group rank in bracket page.
Fixes #26 -- Bracket page now displays bracket score.
Fixes #27 -- Username now stays after a failed login attempt.
Fixes #29 -- Brackets and Groups can now have special characters in their names.
Fixes #17 -- Unsubscribe footer has been removed from Group invite emails.