* improved: header row and number of players column on game list page.
* new: support for User profiles, with the User's BingoBoards
associated to the account. Old BingoBoards can be claimed, if they have
a password, which is unique for the old Game.
* fixed: corrected url regex for numbers, not to match ""
* fixed: off by one error, causing the bottom/right lines to be 1px too
thin.
* new: optionally use server-sent events for less polling (needs a redis
database)
* improved: added POLLING_INTERVAL / POLLING_INTERVAL_SSE settings to
configure how often updated votes / user numbers should be fetched
* improved: show title text below the board, if javascript is enabled
* new: the bingo page has now a variable middleword set.
* improved: Game and BingoBoard now have ``get_absolute_url``, which
provides i.e links to the game/bingo page in the admin interface.
* improved: style fixes ("veto" title tag)
* improved: added game descriptions to the game list page.