Jifty::Script - Base class for all bin/jifty commands
prepare figures out which command to run. If the user wants
--help give them help.
In the normal case, let App::CLI figure out the command-line.
If they have no command on the command-line, but a JIFTY_COMMAND
environment variable, try that. Otherwise, if the GATEWAY_INTERFACE
environment variable is set, assume we are running under CGI with the
fastcgi command. If all fails, shows the help.
The alias table lets users type
fastcgi in place of
Prints out help for the package using pod2usage.
If the user specified --help, prints a brief usage message
If the user specified --man, prints out a manpage