emcduffie/CEDS: CEDS_GBD-MAPS_SourceCode_2020_v1.0

First code release of the CEDS_GBD-MAPS system, upon submission of the following manuscript:

McDuffie, E. E., S. J. Smith, P. O'Rourke, K. Tibrewal, C. Venkataraman, E. A. Marais, B. Zheng, M. Crippa, M. Brauer, R. V. Martin, A global anthropogenic emission inventory of atmospheric pollutants from sector- and fuel- specific sources (1970- 2017): An application of the Community Emissions Data System (CEDS), Earth System Science Data Discussions, Submitted