[mod] proxify __contains__
[mod] add TODO
[enh] proxify __iter__
[enh] proxify count
[enh] proxify __setitem__
[mod] add tests to __setitem__
[mod] make node.__repr__ more explicit
[enh] proxify __setslice__
[enh] proxify __delslice__
[enh] proxify __getslice__
[enh] add __repr__ to comma proxy list
[enh] proxify comma_proxy_list.fst
[enh] proxify comma_proxy_list.dumps
[enh] proxify comma_proxy_list.help