Aiohttp-swagger3

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- added ability to disable validation per route. Closes `29 <https://github.com/hh-h/aiohttp-swagger3/issues/29>`_
- added discriminator support. Closes `34 <https://github.com/hh-h/aiohttp-swagger3/issues/34>`_
- added RapiDoc UI. Closes `39 <https://github.com/hh-h/aiohttp-swagger3/issues/39>`_

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- one more attempt to fix fonts

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- required files must be in wheel too

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- added missing fonts for ReDoc UI

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- migrated to fastjsonschema

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- added ReDoc UI. Closes `33 <https://github.com/hh-h/aiohttp-swagger3/issues/33>`_