Preliminary explorations with getting a map view as a background to a scatterplot.
[#1188752] Trying out Leaflet as the maps library for CODAP.
Common base class for GraphModel and MapModel
Name change from plotView to plotLayer
In addMap, pass the current dataContext to the MapModel being created.
Refactored GraphDataConfiguration to use PlotDataConfiguration as a base class
Refactored GraphModel to use DataDisplayModel as a base class
Moved out of plot_background_view to provide access from map_background_view
Reorganized directory to make sense for SC
New files for use by MapView
Deleted so we use unminified source for leaflet.
Removed code that prototyped map as graph background.
Modified to work with leaflet and to display data as well as map.
Moved DG.LayerNames to separate file for use elsewhere.
Common ancestor of PlotView and MapLayer
Name change from plotView to plotLayer
Moved much code into PlotLayer base class.
Working on automatically including bounds
Moved Map tool next to Graph tool
Changes related to getting map to rescale to encompass all the data.