initial NamedTypes refactor by JPM
added version to xsd:schema and schemaversion to alto
Comment added about version and schemaversion
Update alto-2-2-draft.xsd
Update alto-2-2-draft.xsd
Update alto-2-2-draft.xsd
Merge pull request #25 from altoxml/2-2-namedtypes

2 2 namedtypes