Changes in version 0.0.0.9002                      

  - Revises internal layer ID promotion scheme to fit (unclear) breaking
    changes between mapgl 0.4.4 and 0.4.6.

                     Changes in version 0.0.0.9001                      

  - Full rewrite in mapgl instead of leaflet. This removes hacks around
    not redrawing polygons.
  - Package depends on mapgl (>= 0.4.1) to have layer-based filtering,
    which is necessary for fast precinct-level statistics.

                     Changes in version 0.0.0.9000                      

  - Adds interactive district builder with draw()
      - Adds primary draw panel for interactive redistricting
      - Adds demographics panel for population details by district
      - Adds integrity panel for assessing traditional redistricting
        criteria
      - Adds elections panel for summarizing partisan outcomes
      - Adds algorithms panel for using redist algorithms to redraw
        subsets of districts