REMIND Run Portability Snags

The idea used to be that a REMIND run can be used from its directory independent of all other REMIND code. Currently, that's not the case any more in at least two instances. I copied a run to a temporary directory for debugging and got this:

$ grep Error log.txt | sort | uniq
Error in fread("../../modules/35_transport/edge_esm/input/EDGEscenario_description.csv") : 
Error in read.magpie("../../modules/11_aerosols/exoGAINS/input/ef_gains.cs4r")

So at least two files need to be included in https://github.com/remindmodel/remind/blob/be7a866d4318ce78cd09a92b7f9637421dd3f106/config/default.cfg#L460-L475 and scripts need to be adjusted.