Begin the implementation of Rose-NextGen

 - Create package org.ow2.chameleon.rose.ng for all the work on Rose-NextGen
 - Move class RoseImporterDiscovery, DiscoveryService, ImportDeclaration and
   ImportDeclarationImpl to this new package
 - Add somes skeletons classes
 - Update BinaryLightUPnPDiscovery
 - Delete all remoteAdminService references in rose.ng