Frameworks

[hjacobs]

First goal to decouple Connexion from Flask: extract calls to Flask into the new Framework interface.

Addresses #380

** WORK IN PROGRESS - DO NOT MERGE **

PR opened for discussion cc @garbas

[dutradda]

@hjacobs are you working on it now?
I am thinking to code to decouple flask from the validators classes.
I am creating a AioHttpFramework class and I stuck on validators. Can I decouple this things and the all things that I will need to create the AioHttpFramework?
I am thinking to create two simple namedtuple for Request/Response to wrap from on frameworks. This is necessary because all the frameworks have differents interfaces, and the connexion needs to have it own request/response interface.
So the Framework class should has two more abstract methods: _request_decorator and _response_decorator. This methods will do the conversion from frameworks request/response types to connexion types.

[rafaelcaricio]

@dutradda You can move forward with that.

[rafaelcaricio]

For now we are moving forward with #394. Closing this.