Aiohttp-apiset

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* Up swagger-ui and fix prefix static url
* Support for decimal in JsonEncoder

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* Added check for similar patterns on one location
* Fix static return default if filename empty

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* TreeUrlDispatcher is stand-alone router
* swagger_ui param now str url location for swagger-ui
* spec query param for swagger-ui location to point to basePath
* Take into account the default value for array parameters (Alain Leufroy 6)
* Extract docstring swagger data in route_factory
* Compatibility with py36 and aiohttp2.0

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* fixed swagger extractor from docstring
* support aiohttp 1.2

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* Added support pathlib
* Drop deprecated methods in views

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* Added support for collectionFormat (4)