restore update_summary code
and fix bug in unplanned work logging
remove UserCreationForm from agent page if agent is not an individual
and add some CachedEventSummary checking code
make the tests pass again...
add more comments to questionable code
remove Resource.unit_of_quantity from ExplosionTest
Merge branch 'valueEquation' of github.com:valnet/valuenetwork into valueEquation
Merge branch 'master' of git@github.com:valnet/valuenetwork.git into valueEquation

Conflicts:
	valuenetwork/valueaccounting/models.py