Release v0.1.5

effectclass 0.1.5

• add_fan() groups the traces when setting name.

Release v0.1.4

effectclass 0.1.4

• add_fan(), add_classification(), reference_shape() and
  reference_text() adds support for plotly::plot_ly().
• change_breaks() generate nice breaks on a logarithmic scale.
• format_ci() gains a change argument, mostly useful in combination with
  percent = TRUE.
  This converts 80% to -20% and 120% to +20%.
• stat_fan() displays by default 5% intervals.
• stat_effect() uses text symbols with a circle background.
• Added a NEWS.md file to track changes to the package.