fix: just use upstream main() for webapi

apparently this demo is not customizing anything and had some old code
which no longer works (auth policy)

rattail_demo/web/webapi.py

@@ -3,50 +3,11 @@
 Rattail Demo web API
 """
 
-from __future__ import unicode_literals, absolute_import
-
-from pyramid.config import Configurator
-from pyramid.authentication import SessionAuthenticationPolicy
-
-from tailbone import app
-from tailbone.auth import TailboneAuthorizationPolicy
+from tailbone import webapi as base
 
 
 def main(global_config, **settings):
     """
     This function returns a Pyramid WSGI application.
     """
-    # make config objects
-    rattail_config = app.make_rattail_config(settings)
-    pyramid_config = Configurator(settings=settings, root_factory=app.Root)
-
-    # configure user authorization / authentication
-    pyramid_config.set_authorization_policy(TailboneAuthorizationPolicy())
-    pyramid_config.set_authentication_policy(SessionAuthenticationPolicy())
-
-    # always require CSRF token protection
-    pyramid_config.set_default_csrf_options(require_csrf=True, token='_csrf', header='X-XSRF-TOKEN')
-
-    # bring in some Pyramid goodies
-    pyramid_config.include('tailbone.beaker')
-    pyramid_config.include('pyramid_tm')
-    pyramid_config.include('cornice')
-
-    # bring in the pyramid_retry logic, if available
-    # TODO: pretty soon we can require this package, hopefully..
-    try:
-        import pyramid_retry
-    except ImportError:
-        pass
-    else:
-        pyramid_config.include('pyramid_retry')
-
-    # add some permissions magic
-    pyramid_config.add_directive('add_tailbone_permission_group', 'tailbone.auth.add_permission_group')
-    pyramid_config.add_directive('add_tailbone_permission', 'tailbone.auth.add_permission')
-
-    # bring in some Tailbone
-    pyramid_config.include('tailbone.subscribers')
-    pyramid_config.include('tailbone.api')
-
-    return pyramid_config.make_wsgi_app()
+    return base.main(global_config, **settings)