put message functions  to separate file.
show logo have own function called head().
ngrok wrapper script
words generator for ngrok subdomain name
ngrok command options.
0,0,6beta
ngrok path option
serve ngrok binary path through command line option -N. default to '/usr/bin/ngrok'
check ngrok binary file existence
sample commands using ngrok option
remove arg_log var and rename startngrok to initngrok