Mirrors gdb.install_gff3_converter. Required for the
ucsc-hub backend's genes set (UCSC mammal hubs ship GTFs).
Examples
if (FALSE) { # \dontrun{
gdb.install_gtf_converter()
Sys.setenv(MISHA_GTF_TO_GENEPRED = "/path/to/your/gtfToGenePred")
} # }