20120731
========

- Worked on :mod:`lino.apps.presto`.

  Presto now also uses :mod:`lino.modlib.households`. 

  :mod:`lino.modlib.households` no longer depends on :mod:`lino.apps.pcsw`.

  `households.Household` now also supports being listed in 
  :attr:`override_modlib_models <lino.Lino.override_modlib_models>`

- Bugfix: TypeError 
  "duplicate_row() got an unexpected keyword argument 'seqno'"
  when trying to duplicate a budget entry.
  
- Bugfix: NameError "global name 'ucsv' is not defined" when `[csv]`

- Reversed sort order of cal.Tasks: newest tasks come first.

- Continued with the test suite.