Added the --verbose, --start and --end command line options

Not yet implemented...
Documented the --start, --end and --verbose options
Mentioned usage in the README
autodie is still a bit new on some systems...
Refactored the db and table initialisation into a sub
Refactored the main processing loop out into a sub
Refactored the options processing into a sub
Explicitly passing the table to use to init_database() and process_data_for_day()