Added new command line arguments

When launching Jarvis from the command line, you can now specify some
new arguments

'-nogui' allows the user to bypass Jarvis' GUI in favor of a rewritten
retro-command line Jarvis

'-nostyling' allows the user to relive the glory days of Windows 95 by
disabling XP styling.

Please note that if you pass both arguments, '-nogui' will be read
before '-nostyling'