event should not inherit anymore from crm.case.section: it's a new object
put a parent_id field to keep the hierarchy
sale team m2o is kept, but it's a widget=selection: The reply-to on the event is also filled when choosing a sale team
put domain on locaiton room: same country as selected location country
cost: rename in registration cost
demo data: not fixed date
maximum and minimum registration: return warning when we try to open an event that haven't not the requirements
Improved form view
bzr revid: hmo@tinyerp.com-20100715134144-lmfwa02wnsntdd9q
SKH,Jay