The sixpack update

1. Changed inf/accounts.php to /inf/config.php for future configuration
options.
2. Made an option for the header to be inserted with the function
ss_header(). $showheader must equal true before speedysite.php is
included for the header to be insertable instead of plopped on the top.
3. Moved the demo file to the main directory and deleted the demo
directory.
Fixed a sloppy error

Line 54 should have been checking if config.php exists not accounts.php
Fixed another sloppy error

demo.php was including speedysite.php from one folder back like it used
to do in the demos folder...
Made the demo page use the custom header