Title : pattern(3) Usage : my $pattern = $sitepair->pattern(); # gets the pattern

 Title   : GFF
 Usage   : print $site->GFF();
         : print $site->GFF($gff_formatter)
 Function: returns a "standard" multiline GFF string 
 Returns : a string (multiline, newline terminated)
 Args    : a $gff_formatter function reference (optional)

 Title   : site1
           site2
 Usage   : my $site1 = $sitepair->site1();      
                                                
 Function:  Returns individual TFBS::Site objects, from the site pair
 Returns : a TFBS::Site
 Args    : none