for groups. In the process, added some select_related/prefetch_related
code to cut the number of database queries in the agenda down from
4000-5000 to about 50. Rewritten agenda CSV code to use Python arrays
rather than a template for improved readability/reuse. Rewritten week
view to assemble its data in Python. Plus a few other minor cleanups,
e.g. lame_description is now gone.
Fixes#1088. Branch ready for merge.
- Legacy-Id: 9669
currently active, otherwise we can't see from the return value whether
a given time predates the history set. The downside is that the caller
may now need to check whether it got a history object or the same
object back.
- Legacy-Id: 4560
