InstallItem variable iid_inherite renamed iid_inherit
InstallItem variable iid_iid added
InstallItem.read_from_yaml check key names and raises KeyError for illegal keys
InstlClient.add_deafult_items renamed add_default_items
InstlInstanceSync_url.mark_required_items_for_source: better messages in case a source is missing from map
InstlInstanceSync_url:  if a file/folder is missing for the map look for .wtar files with the same name and download them instead.
New method SVNItem.walk_items_with_filter to be able to walk only items that pass a condition