Products.plonepas

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- Avoid a deprecation warning for the credentialsChanged method.
[hannosch]

- Fixed problems with missing user cache invalidation. This closes
http://dev.plone.org/plone/ticket/10715.
[fafhrd, hannosch]

- Make VirtualGroup inherit from PropertiedUser so it gets wrapped correctly.
Have getGroupsForPrincipal not return the AutoGroup as a member of itself.
Closes http://dev.plone.org/plone/ticket/10568.
[cah190]

- PluggableAuthService expects a list of group ids from getGroups, don't pass a
list of wrapped groups instead.
[cah190, esteele]

- Added a custom `IMembershipTool` interface to PlonePAS extending the base one
from CMFCore. It adds the `getMemberInfo` method to the mix. This closes
http://dev.plone.org/plone/ticket/10240.
[hannosch]

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- Fixed a test to no longer use removed Large Plone Folder type.
[davisagli]

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- Removed special unauthorized view workaround, after the underlying issue
has been fixed in Zope2.
[davisagli, hannosch]

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- Added manage_setMembersFolderById method for ZMI.
Fixes http://dev.plone.org/plone/ticket/10400
[daftdog]

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- Revert incorrect PIL import change.
[hannosch]

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- Install recursive_groups in new sites by default. Make it the last
IGroupsPlugin installed.
[esteele]

- Remove caching of utils.py's getGroupsForPrincipal method as it was nastily
overzealous.
[esteele, cah190]

- Use sets instead of util.py's 'unique' method.
[esteele]