Changes in version 0.1.0                        

The first public version, the successor of peditools (written anew; not
compatible with it).

  - Z-scores, probabilities and measurements: growth_z(), growth_p(),
    growth_y(), growth_detail(), vectorised over every argument.
  - Methods: LMS; WHO's restricted LMS method beyond ±3 SD (sd23); CDC's
    extended BMI-for-age method (cdc_bmi_ext); the INTERGROWTH-21st ST3
    and normal models. The published method by default; each can be
    switched.
  - Coverage and extrapolation (extrapolate: "coverage", "none",
    "linear").
  - Parameters: growth_charts(), growth_table(), growth_equations(),
    growth_params(); growth_lms_z(), growth_lms_y(), growth_st3_z(),
    growth_st3_y() on parameters given directly.
  - References: growth_references(), growth_data_version().
  - Curves and plots: growth_curves(), growth_plot() (ggplot2).
  - Your own charts: growth_add_chart(), growth_remove_chart().
  - Helpers: growth_convert(), growth_age_days(),
    growth_corrected_age(), growth_pma().