Simplified services for oai-pmh metadata.

config/module.config.php

src/OaiPmh/Metadata/AbstractMetadata.php

src/OaiPmh/Metadata/CdwaLite.php

src/OaiPmh/Metadata/Mets.php

src/OaiPmh/Metadata/Mods.php

src/OaiPmh/Metadata/OaiDc.php

src/OaiPmh/Metadata/OaiDcterms.php

src/Service/OaiPmh/Metadata/MetadataFormatFactory.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