TheseusPlot 0.3.0

User-visible changes

• Added an xlab argument to create_ship() for customizing the x-axis label
  used by plot() and plot_flip().
• The automatic column-name subtitle was removed.
• Changed the default group labels from "Original" and "Refitted" to
  "Baseline" and "Comparison".
• Changed the default number of displayed decimal places from 3 to 1.

Plot improvements and bug fixes

• Fixed missing subgroup size bars in plot() and plot_flip() with
  waterfalls 1.1.4.
• Improved subgroup size bar scaling so that bar heights are computed
  consistently from the maximum plot score in both plot() and plot_flip().
• Fixed text_size handling in plot() and plot_flip() when applying the
  current ggplot2 theme.