Aiopyramid

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- Merge fix for `ignore_websocket_closed` to allow chained exceptions
- Add option to coerce bytes to str for uwsgi websockets

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- Support Python3.5

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- Fix issues related to POST requests
- Fix issues related to coroutine mappers
- Sync with Gunicorn settings a la issue 917

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- Add sphinx
- Migrate README to sphinx docs
- Add helpers for authentication
- Deprecated aiopyramid.traversal, use aiopyramid.helpers.synchronize
- Deprecated aiopyramid.tweens, moved examples to docs

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- Fix issue with gunicorn websockets
- Fix issue with class-based view mappers

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- Fix issue with `synchronize`