- taf-kit/tests/wrapper.in: Remove the fake commands.

- taf-kit/src/library_commands.hh: New.  Define `list-automata' and
`dump-automaton'.
- taf-kit/src/common_commands.hh: Include it.
- taf-kit/src/z_commands.cc,
- taf-kit/src/b_commands.cc: Add them.

- taf-kit/src/edit_automaton.hh,
- taf-kit/src/edit_automaton.hxx: Move to...
- taf-kit/src/edition_commands.hh,
- taf-kit/src/edition_commands.hxx: Here.  For name consistency.

- taf-kit/src/getters.hxx: Be more verbose, fix typo.

- taf-kit/src/commands_macros.hh,
- taf-kit/src/interface.cc: Handle commands with 0 argument.

- taf-kit/src/Makefile.am: Update.