v0.2.1.0 revise __um_search()
v0.2.1.1 revise __um_list()
v0.2.1.2 revise __um_info()
v0.2.1.3 revise __um_cloud()
v0.2.2.0 delete __um_tags(), subcommand -t and option -p
v0.2.3.0 delete subcommand -D and options -E and -f
v0.2.3.1 revise __um_search()
v0.2.3.2 revise __um_add()
v0.2.3.3 revise __um_calculating_id()
v0.2.3.4 revise __um_rebuild() and __um_rebuild_index()
v0.2.4.0 delete subcommand -r
v0.2.4.1 revise __um_main()
v0.2.4.2 revise __um_cloud()
v0.2.4.3 revise __um_main()
v0.2.4.4 revise __um_main(), __um_edit() and __um_rebuild_index()
v0.2.5.0 revise __um_edit()
v0.2.5.0 revise __um_edit()
v0.2.5.0 revise __um_edit()
v0.2.5.1 revise __um_delete()
v0.2.5.2 revise __um_modify()