created sum_duplicates.r in ohi_clean_fxns.r: this sums values for duplicate regions: rgn_ids= 13, 116, 209: Puerto Rico/USVI; Guam; China/Hong Kong/Macao. Tested with WGI; finalized data layer.
finalized WGI files with new sum_duplicates.r file
fixed a problem with add_rgn_id.r that I introduced when translating from sqlite to dplyr. resaved WorldBank-Statistics_v2012-cleaned
saved WorldBank data without duplicates running sum_duplicates.r. Had to fix one bug but now it's all set