Minor tweaks to Hooke's [command
stacks](http://www.physics.drexel.edu/~wking/code/hg/hgwebdir.cgi/hooke/rev/8c0882dfbaf5).  I can now execute the GUI alternative of

    ./bin/hk.py 
        -c 'new_playlist'
        -c 'glob_curves_to_playlist *'
        -c 'start_command_capture'
        -c 'zero_surface_contact_point --block retract'
        -c 'stop_command_capture'
        -c 'apply_command_stack_to_playlist'
        -c 'curve_info'
        -p

Issues resolved today:

1) GUI-generated commands clogging the command stack instead of
   being executed.  Fixed with CommandMessage.explicit_user_call.
2) Playlist._loaded desyncronization from old 'apply command stack
   to playlist'.  Fixed with Playlist.unload().

Update:

After [fixing up a few more
bugs](http://www.physics.drexel.edu/~wking/code/hg/hgwebdir.cgi/hooke/rev/7ba2243a9b45),
I successfully ran:

    ./bin/hk.py 
        -c 'new_playlist'
        -c 'glob_curves_to_playlist *'
        -c 'start_command_capture'
        -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 'stop_command_capture'
        -c 'apply_command_stack_to_playlist --enable-evaluate'
        -c 'save_playlist --output o.hkp'


on 2400 curves with the command line UI.  Tomorrow I'll run through
those with the GUI.

[[!tag tags/hooke]]
[[!tag tags/programming]]