Pyramid-caching

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* New release to fix packaging issue

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* Add the HTTP scheme to the cache key (mostly for generated links in response)

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* Bypass cache when an error occurs while getting the cache key version or the
cached data.

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* ext.sqlalchemy: Increment new and deleted entities and table identities.
* Simple dependency resolution for location-aware resources.
* ext.royal: New extension for caching pyramid_royal resources.
* Allow key identity generators to define resources that don't need to be
invalidated.

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* Breaking changes: ``cache_factory`` keyword arguments ``depends_on`` is a
list of callables which receiving request as positional argument. Callables
return the dependency to be identified by cache manager.
* Add arguments ``predicates`` to ``cache_factory`` which permits to add
predicates to cache key used for the view (useful for query strings).

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* Switch back to d2to1.