Discuss W1 option take-over into W2

[Juergen Reuter]

1. keep best grid as fall back option like W1
2. accuracy_goal
3. allow to ignore checksum test
4. gzipped grid files (via named pipes) and process subdirectories
5. safety_factor, flag events w/weight > 1 (plot_excess)
6. events_per_file, including starting number
7. signal handling: save/restore vamp grid CONTENTS
8. show_* for debug output format

obsolete:

1. use_efficiency (efficiency fluctuates)
2. time_limit_adaptation (dangerous and machine dependent)
3. generate_phase_space (old development flag)
4. write_phase_space_channels_file
5. extra_off_shell_lines
6. splitting_depth (only single logs, not important)
7. single/double_off_shell_branchings/decays
8. massive_fsr
9. single/double_off_shell_branchings/decays
10. massive_fsr
11. write_weights/write_weights_file
12. guess_color_flow
13. pythia_processes
14. time_limit (only for hard nosed batch systems)
15. warn_empty_channel (only for pathological cases)
16. show_pythia_initialization
17. show_pythia_statistics
18. screen_events, screen_histograms
19. screen_diagnostics
20. plot_grids_channels, plot_grids_logscale (impractical for large number of channels?)

implemented:

1. fragment/fragmentation_method
2. plot_width, plot_height