Added an option to specify the output of the resources and uris.

config/module.config.php

src/Form/ConfigForm.php

src/OaiPmh/AbstractXmlGenerator.php

src/OaiPmh/Metadata/AbstractMetadata.php

src/OaiPmh/Metadata/Mets.php

src/OaiPmh/Metadata/OaiDc.php

src/OaiPmh/Metadata/OaiDcterms.php

src/Service/Form/ConfigFormFactory.php

src/Service/OaiPmh/Metadata/CdwaLiteFactory.php

src/Service/OaiPmh/Metadata/MetsFactory.php

src/Service/OaiPmh/Metadata/ModsFactory.php

src/Service/OaiPmh/Metadata/OaiDcFactory.php

src/Service/OaiPmh/Metadata/OaiDctermsFactory.php