Path to an organism on NCBI's
Genomes/RefSeq FTP site. Examples would be
bacteria/Acetobacter_aceti/latest_assembly_versions/GCF_002723895.1_ASM272389v1.
If there are multiple matching directories the user will be prompted to choose
one. If there are multiple matching gbk files the user will also be
prompted to choose one or more.
ignore.case
Ignore case when matching.
.parse
if FALSE, return a character vector instead
of a '>gbRecord object.