Change title for the table sidebar to something more appropriate

Author: mbilker

index.html

@@ -76,7 +76,7 @@ <h3>Legend</h3>
       </footer>
     </div>
     <div id="unmappedRecords">
-      <h3>Invalid Entries</h3>
+      <h3>Unmapped Records</h3>
       <ul id="badMarkers"></ul>
     </div>
   </div>