import models on binding definition

[adalessa]

From the conversation on the issue #945 the generation of the file more specific here #945 (comment) to avoid errors on the bindings definitions is necessary to reference the models. In order to import all the generated models it is necessary to us the as and give a namespace and of course it is necessary to add it to the use of the types.

[leaanthony]

Thanks for doing this! LGTM!