Come up with country-groupings as ways to slice data

[lucychambers]

E.g. developing countries, OECD

[lucychambers]

In progress. Elena has also sent through some suggested groupings: https://docs.google.com/file/d/1O7VJact97xxoFGDmg9kzXuHPTre9G3eeOfIPtAYaEaRIoDVihcmFJkn8l9b3/edit

[teajaymars]

Final version of groupings data is mirrored here:

https://docs.google.com/spreadsheet/ccc?key=0Au6XVBWIk_RndEdoUUNDUEJoeVZnNEZJTjRmVHhWSHc

Viewers may need to request access to the spreadsheet.
The data also lives inside the code repository (it is one input to the ETL process).