Need to multiply by 1e5 so it displays the deat rate per 100k inhabs.

Rather than 5 variables with names of countries for different groups.

It was re-arranged later and left over.

Updated version of the plan to reflect changes in the source for country borders and population size. Updated versions of the trend(), dmrplot(), and rgrplot functions.

Added a geopackage file containing GAUL0 (country-level) borders, as well as WorldPop population size predicted for 2020

Changes in the documents to reflect changes in the used data sets, and changes in the epidemiological situation.

Changes in functions to handle vector layers of asministrative data, motivated by the use of the GAUL data set of administrative country borders. Also, changes in the trend() function to account for special cases, and in the dmrplot function to improve data rendering.

Conflict with Cairo device.
https://github.com/yihui/knitr/issues/1365

WCAfrica cartography: move from workflow based on script and saved files to drake targets and functions.