Fix a bug with Node.path and detached parents
Do not flush within Node.path event handlers.  And upgrade SQLAlchemy.
Fix deprecation warnings with regard to Pyramid's custom_view_predicates and set_request_property.
Release 0.10a3
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Allow 'system.Authenticated' to be used as a role in workflow.zcml.
Added missing fixed version requirements.
pep8-ish fix
Avoid waking up all columns in this migration script.
Don't fire events (e.g. update modification date) in migrations.
Upgrade Pyramid to version 1.5.1
Prepare for release
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Add a __json__ method to MutationList and MutationDict so that pyramid json serializer can process them.
__json__ should recurse