Feature/swagger ui behind proxy#596

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adroffner wants to merge 4 commits intonoirbizarre:masterfrom

adroffner:feature/swagger-ui-behind-proxy

Commits on Feb 26, 2019

New Feature: Api(..., behind_proxy=True) allows the Swagger-UI javascript to be viewed from behind a proxy.
Droffner, Andrew (ad718x)
committed
Set version in flask_restplus/__about__.py file.
Droffner, Andrew (ad718x)
committed
Set PEP 440 compliant __version__ in flask_restplus/__about__.py
Droffner, Andrew (ad718x)
committed
Simplify the api.specs_url property using the _external=False option to generate the relative URL.
Droffner, Andrew (ad718x)
committed