Plone.protect

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- conditionally patch Products.PluggableAuthService if needed
[vangheem]

- Do not raise ComponentLookupError on transform
[vangheem]

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- Fix pluggable auth CSRF warnings on zope root. Very difficult to reproduce.
Just let plone.protect do it's job also on zope root.
[vangheem]

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- Just return if the request object is not valid.
[vangheem]

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- fix pluggable auth CSRF warnings
[vangheem]

- fix detecting safe object writes on non-GET requests
[vangheem]

- instead of using _v_safe_write users should now use the safeWrite function
in plone.protect.auto
[vangheem]

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- patch locking functions to use _v_safe_write attribute
[vangheem]

- Be able to use _v_safe_write attribute to specify objects are safe to write
[vangheem]

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- handle zope root not having IKeyManager Utility and CRSF protection
not being supported on zope root requests yet
[vangheem]