checklist.inc - deleted duplicate BIND 9 checklist icon entry

finding.inc - removed ID property to prevent duplicate findings from being added to the table
host_list.inc - deleted unused constructor
import.inc - formatting
db_schema.json - removed sagacity.findings.id field (making tgt_id and pdi_id new primary keys), and updated references
Database_Baseline.zip - updated routines for above change
background_results.php - fixed bug #19
export-ckl.php - performance adjustments
parse_excel_echecklist.php - performance improvements, ensure duplicate findings are not created, make eChecklist true status, update for removing findings.id field
parse_nvd_json_cve.php - convert reading json to array instead of object for reading CPEs (which were updated to CPE 2.3 instead of 2.2)
parse_* - remove findings.id field
database.inc - formatting, and update for removing findings.id field
index.php - ensure user can't import a host list without uploading a host list file

Fixed:
#65, #51, #28, #27, #10

inc/xml_parser.inc

@@ -178,7 +178,7 @@ class scan_xml_parser
     /**
      * The previous stack element
      *
-     * @var unknown
+     * @var string
      */
     var $previous = null;
 
@@ -192,9 +192,9 @@ class scan_xml_parser
     /**
      * Construct
      *
-     * @param unknown $obj_in
-     * @param unknown $ste_id_in
-     * @param unknown $scan_fname
+     * @param mixed $obj_in
+     * @param int $ste_id_in
+     * @param string $scan_fname
      */
     function __construct($obj_in, $ste_id_in, $scan_fname)
     {