afcharts 0.5.1

• Updated the sequential colour palette to add two new shades (darkest-blue and lightest-blue).
  This means that the sequential palette can now be used to represent five categories, such as deprivation quintiles.

• Renamed na_colour argument of scale_colour_continuous_af and scale_fill_continuous_af to na.value. This was necessary to enable use_afcharts to work with ggplot2 v4.0.1. Added na.value argument to scale_colour_discrete_af and scale_fill_discrete_af.

• use_afcharts gains a reset argument to turn off analysis function styling of charts.

• theme_af now uses theme options set by earlier calls of use_afcharts by default. #51

• Set the main colour palettes to categorical. The Scale_*_discrete_af functions now use the 6 colour cateogrical palette by default, rather than the 4 colour.

• Added af_dark_blue, af_orange and af_grey to give easier access to the hex codes of these colours.

• Added arguments axis_text and axis_title to function theme_af to set
  whether to show axis titles and labels.

• Added argument legend_title to function theme_af to set whether to show
  legend titles.

• The legend argument of theme_af now accepts a legend justification e.g. 'top-right', 'left-centre' #47

afcharts 0.4.1

• Fixed bug which prevented some functions from working if called directly without attaching the package.

• Fixed bug in use_afcharts when passing args to theme_af.

• scale_colour_discrete_af and scale_fill_discrete_af now inform rather than warn when the main2 colour palette is used instead of main if only two colours are required.

afcharts 0.4.0

First release of package based on sgplot.