Add support for plotting projected and source data
Add support for plotting projected and source data

This is a big change that adds support for plotting projected as well as
source time-series population data.  There are currently a number of
click arguments that will plot HYDE, SPS, or projected data.  Each reads
a different data source and plots the worldwide human population total.

ricardog/raster-project,ricardog/raster-project,ricardog/raster-project,ricardog/raster-project,ricardog/raster-project