v0.2.6.0 created __um_cat_indexes(); revise find command in __um_search() and __um_search_binary()
v0.2.6.0 created __um_cat_indexes(); revise find command in __um_search() and __um_search_binary()
v0.2.6.1 revise __um_list()
v0.2.6.2 revise __um_cloud()
v0.2.6.3 revise __um_info()
v0.2.6.4 revise __um_calculating_id()
v0.2.6.5 revise __um_delete_empty_dirs()
v0.2.6.6 revise calling of subcommands