TODO

General

Implement argument checks
Add examples to function documentations (e.g. for model_combine())
create_daylength_...(): switch from suncalc to geosphere (less dependencies...)
Make output of create_suntimes_...() and create_daylength_...() consistent (minutes OR hours)
Define a BarrksPheno (or similar) class
Make order of input raster layers irrelevant (use the date)
phenology(): All rasters from .storage are used even though .dates are not NULL
Further customization options for plot_development_diagram():
- Fill incomplete generations: yes/no
plot_development_diagram(): Adjust legend if .minmax_only == TRUE
Unify status messages (print temporary only?)
Make storage messages optional
Improve performance of create_suntimes_df()

BSO
- get_onset_rst is not working for BSO
- Implement original daylength function?
- Define functions bso_save_phenology() and bso_load_phenology()
- Enable application of mortality
- bso_plot_flight_diagram()/bso_plot_stage_diagram(): make x-axis optional
- Improve performance of bso_plot_stage_diagram()
- Define functions to get the share of individuals flying / in a specific stage / ...
- Improve performace of bso_calc_tphloem()
Lange: Improve performance
PHENIPS-Clim
- Improve performance of the calculation of development rates
- Allow custom intervals or function for dev_rates