UPD: first steps to move to complete uris
UPD: removed search_item but not finished the problem with the uri
FIX: added utf-8 encoding for create_uri_path
UPD: removed params from items. We can do it with uris.
FIX: created wrong uri for context menus
FIX: create path and params from the sys parameters provides by xbmc/kodi
FIX: simplified the handling of search item. We use only strings.