improve the benchmark plots

changelog

• add (komodo) to the benchmark names for commit and setup for easier parsing
• add --bench commit to plot the commit times
• make the plot.py more robust
  • use ns_to_ms and b_to_kb to convert times and filesizes
  • remove the prefix from bench IDs and always take the first space-separated token as the input data size
• remove the "bounds" from the labels
• remove the "mean" from the labels when there's only the mean to show
• plot the figures in fullscreen
• add --save to save the figures directly to disk with a little message
• add --all to plot / save all the figures at once

examples