Static text at top + panel bids

The text at the top of the bid can now change with the bid.
The panel bids form (a variant of class bid) has been added.
Merge branch 'master' of https://github.com/bethlakshmi/GBE2

Conflicts:
	expo/gbe/urls.py

merging for rework of /bid/response - it looks like there was a change to login/logout - which may be Jon?