first step accept host stuff
added subdomain to config
added subdomain to test
added working tests
bugfix and ran 'php-cs-fixer fix'
changed to correct quotes
bugfix, changed 403 to just return
changed to more generic hosts
bugfix and corrected config
Abstracted cors configuration

CORS configuration is now provided by an instance of
Cors\Options\ProviderInterface.

A default options provider implements the existing
semantical configuration.

Additional providers can be registered using the
nelmio_cors.options_provider service tag, with
an optional priority attribute (default is 0, and
the semantical configuration provider has a priority of -1.
Update CorsListener.php
Merge remote-tracking branch 'bdunogier/abstract_cors_configuration'
CS fixes
In case the config resolves to nothing, make sure we abort, refs #16
Merge remote-tracking branch 'monbro/master'

Conflicts:
	EventListener/CorsListener.php
	Tests/CorsListenerTest.php
CS fixes