added low level method Publish/Post on the Import/Export API for publishing multiple objects at once
see http://api.immobilienscout24.de/our-apis/import-export/publish/post.html
fixed an error in "common-1.0.xsd"
If multiple real estates are published at once, the response contains error messages and error codes. These values are currently not part of the XML schema because of a mistake in schema definition. The mistake was fixed and JAXB classes were regenerated.