Parsing Command-Line Arguments

This is a command-line argument parser which wraps the powerful Perl module Getopt::Long and with some adaptations for easier use in R.

This R package is a wrapper of perl module `Getopt::Long`. 
Basically, all Perl distributions contain `Getopt::Long` as a core module and 
`JSON` module is already included in this package. So minimal requirement
for you to use this package is you should have Perl to be installed.