Figure out specific files and IDs depending on what files exist and whethet vcfdir is set

Figure out specific files and IDs depending on what files exist and whethet vcfdir is set

organise_ids(id, vcfdir)

Arguments

id	List of IDs within the vcfdir structure, or a list of GWAS VCF files, or a mixture
vcfdir	Location of GWAS VCF files, or NULL if id is a list of actual files

Value

File paths to all datasets