Version 1.0.0

First stable release. Phases 0-7 complete:
- Elevation, slope, water, paths, plant habitats, animal abundances
- Ecological sampling with point and camera observers
- Ground-truth reporting: report_layer_correlations(), report_driver_relationships()
- Visualization: plot_landscape(), plot_habitat_correlations(),
  plot_animal_correlations(), plot_animals(), plot.jsdm_sample()
- 739 tests passing