Merge tag 'v1.2.1'

version 1.2.1

Conflicts:
	ChangeLog
	setup.py
added light theme, to override the dark theme, when dark is used as default THEME.

when using THEME="bingo/themes/dark.css", the light theme can be added
to the THEMES list, as ('light', 'bingo/themes/light.css').
alt- and title-text for board thumbnails
fix for timezone in get_last_used
show created / last used times on expired boards
switch between voted/marked thumbnail on mouseover
switch between voted / marked thumbs on game page, too
do not wrap the text in the header
new: times.get_endtime() method
cleanup: dict as get_times() return value
new: implemented VOTE_TIME_START, which sets a start time for voting.
fix for undefined vote_start_time, if no VOTE_START_TIME is set
doc update: VOTE_TIME_START -> VOTE_START_TIME
style fix: removed border around ul with floating entries
added clearfix to pagination in game_list.html
added a "powered by django-bingo" footer

Added a "powered by django-bingo" footer, which can be replaced or
extended by overriding the {% block footer %} of base.html