------------------
- Namechooser: Attempt to return an id with timestamp before returning a
value error after 100 id check attempts.
[eleddy]
- Namechooser: Pass the parent object to the Plone check_id script so
it can detect duplicates.
- Namechooser: Use the Zope ObjectManager _checkId method to check
new ids when possible, to avoid errors when adding invalid
ids not caught by the old check. This fixes
http://code.google.com/p/dexterity/issues/detail?id=244
[davisagli]