Upgraded hooke.plugin.polymer_fit commands to ColumnAddingArgument subclasses.

Upgraded hooke.plugin.polymer_fit commands to ColumnAddingArgument subclasses.

Now the following command works:

    $ bin/hk.py
        -c 'load_playlist test/data/test'
        -c 'zero_surface_contact_point --block retract'
        -c 'flat_filter_peaks --block retract --min_points 1'
        -c 'zero_surface_contact_point --block retract
                --ignore_after_last_peak_info_name "flat filter peaks"'
        -c 'convert_distance_to_force --block retract
                --deflection_column "surface deflection (m)"'
        -c 'remove_cantilever_from_extension --block retract'
        -c 'flat_peaks_to_polymer_peaks --block retract'
        -c 'polymer_fit_peaks --block retract'
        -c 'export_block --block retract --output myblock.dat'
        --persist

See related commands in 725a18055518 and 27bf3c1e98e1.