make a zip file containg all shapefile files

Hi @chei90, together with Andrea I'm also checking the apps before sending them out to review. I think it would be nice, i.e. easier for the user, if all files of the shp are zipped into one artifact. The way to do that is to create a temporary directory were all the files are put in, this temporary directory is then zipped and given out as a artifact. It has to be a temporary directory, because currently anartifact cannot be a folder. Unfortunately I do not know how to do this in Phyton, but in case you know R, here is an instruction how to do this in R, and here (~L65, ~L230-234) an example within a R app. This does not have high priority, but it would be nice to have it as some point. Thanks

chei90 / EMAC_Corridors

make a zip file containg all shapefile files #3