Send ContainerModifiedEvent when appropriate.

This requires Five 1.3+ >= r20254.

Some BBB has been kept until Zope 3.2 >= r40368 is stiched in.

remove the use of __ac_permissions__, foo__roles__ and
default__class_init__. A few corner cases can't be converted because of
circular imports.

- replaced url_quote by html_quote for hidden add value (pushing the add button escapes the value again)

Warn when an attempt is made to have a security declaration on a
nonexistent method. Removed one such method.

Fixed unclear security declarations. When bug 761 was fixed,
declareProtected(perm) was made illegal, at least one method name was
required. This checkin does the same for declarePrivate() and
declarePublic().

Also there was a bug in that a class having:
  security = ClassSecurityInfo()
  __ac_permissions__ = ((perm, ()),)
was not equivalent to a class having:
  __ac_permissions__ = ((perm, ()),)
This first form had as a buggy side effect have the behavior of
  __ac_permissions__ = ((perm, ('')),)
which is equivalent to
  __roles__ = PermissonRole(perm)
Not it will simply make the permission available from this object
(with default roles).

  Reduce the number of top-level modules from 4 to 2 by turning Globals
  and Lifetime into packages.  The remaining two, Zope and ImageFile,
  will clean up themselves as they're slated for removal in Zope 2.11.

and Lifetime into packages.  The remaining two, Zope and ImageFile,
will clean up themselves as they're slated for removal in Zope 2.11.

  Update included Five to version 1.3b3.  See Products/Five/CHANGES.txt for more info.

  Make ++skin++ work for Five views by putting another stub method on the
  request.  I wonder when we can retire ZPublisher and use zope.publisher
  instead.

  Make ++skin++ work for Five views by putting another stub method on the
  request.  I wonder when we can retire ZPublisher and use zope.publisher
  instead.

  Restify document and point to ZPL 2.1 license text.

Merge r40238 from 2.9 branch:
  get rid of ZPL 2.0 license text. ZopePublicLicense.txt is taking over

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  Note some changes made recently.