Simplified JAXB classes structure (removed wrapper list classes)

src/main/java/net/ivoa/xml/vospace/v2/CapabilityList.java

src/main/java/net/ivoa/xml/vospace/v2/DataNode.java

...n/java/net/ivoa/xml/vospace/v2/GetPropertiesResponse.java

...in/java/net/ivoa/xml/vospace/v2/GetProtocolsResponse.java

src/main/java/net/ivoa/xml/vospace/v2/GetViewsResponse.java

src/main/java/net/ivoa/xml/vospace/v2/Node.java

src/main/java/net/ivoa/xml/vospace/v2/NodeList.java

src/main/java/net/ivoa/xml/vospace/v2/PropertyList.java

...n/java/net/ivoa/xml/vospace/v2/PropertyReferenceList.java

src/main/java/net/ivoa/xml/vospace/v2/ProtocolList.java

src/main/java/net/ivoa/xml/vospace/v2/ViewList.java

src/test/java/net/ivoa/xml/vospace/v2/NodeTest.java