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

ste/index.php

@@ -604,7 +604,7 @@ include_once 'header.inc';
     </form>
 
     <form method='post' action='#' style='margin-left: 20px;'
-          onsubmit="$('#submit').attr('disabled', true);return true;" id='host-list-form'>
+          onsubmit="if(!$('#host-list-file').val()){return false;}$('#submit').attr('disabled', true);return true;" id='host-list-form'>
         <div style='font-weight:400;color:red;'>Must keep 'host-list' as part of the filename</div>
         <input type='hidden' name='file' id='host-list-file' style='display:none;' />
         <input type='hidden' name='action' value='import_host_list' />