Pyramid-royal

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- Breaking changes: TBD
- Move onctuous away in favor of voluptuous
- Added method tunneling to permit ``PUT``, and ``DELETE`` via ``POST``
methods.
- TBD: adapt how request body is parsed.

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- Add ``Base.__getitem__`` which gets children from ``self.children``

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- Breaking change: Pages parameters are not anymore page & page_size but offset
and limit. It is more developer and db friendly.

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- onctuous schema checking on resource creation.

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- Initial version
- royal renderer able to return bson or json.
- royal.includeme adds royal renderer and views.
- royal.resource.PaginatedResult which permits Collection.index to return
paginated results.
- royal.views with default views for Collection and Resource.
- CollectionView.index does automatic pagination.