A number of bugs

Found and fixed:
- a problem with Duration and Acts - could not submit an act at all
because there was no value for audio info - set a default in the view.
- a bug displaying errors in act edit - the bid.tmpl does not display
“errors” it displays “form.errors” - added an errors array display as
overall logic errors seems smart with multiple forms in play.
- dumb title bug in edit_act that I made (in view.py) yesterday
- business logic flaw in models.py that we don’t really need any tech
info right now to call an an act bid “complete”.