Add "Create new document" feature to ExternalEdit WS

The JAXWS based WS ExternalEdit is able to read / write properties for documents. That is it is able to update the existing Nuxeo document. The request is for adding support for creating a document from the scratch.
The API would look like:
/**

• Creates a new Nuxeo document.
• @param repo the repository where to create
• @param path the path to store the new document
• @param type the document's type
• @param title the document's title
• @return the document reference ID if succesfully created
• @throws ClientAuthenticationException not logged in
• @throws ItemNotFoundException the path is wrong
• @throws ServerProcessingException somethign went wrong
  */
  String createNewDocument(String repo, String path, String type, String title)
  throws ClientAuthenticationException,
  ItemNotFoundException, ServerProcessingException;
  }

Furthermore, the WS' client can update various properties, including the blob property "content", allowing various Office plugins save a new document.
The bootstrap for this actions should look like the usual one, but with fewer data contained.