Ftw-workspace

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- Extend assingable_users vocab - also show interited users.
[mathias.leimgruber]

- Added assingable_users vocab tests using plone.app.testing
[mathias.leimgruber]

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- Add new features:
TabbevViewFolder now also has a textfield.
Toolbar of Textfield is configurable, throught plone registry.
[mathias.leimgruber]

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- Removed documents listing from overview.
[mathias.leimgruber]

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- Totally refactored assignable_users.
Now it only uses local roles and inherited roles.
Groups are also supported
[mathias.leimgruber]

- Fixed arguments for bin/test in test-plone-4.0.x.cfg
[lgraf]

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- Fix description and text format.
[mathias.leimgruber]

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- Removed views from TabbedViewFolder
[ttschanz]