Add notes to import csv

index.html

@@ -239,6 +239,8 @@
           <tr><td>status</td><td></td><td>callable / review / to_learn</td></tr>
           <tr><td>difficulty</td><td></td><td>easy / hard</td></tr>
           <tr><td>term</td><td></td><td>Created if new</td></tr>
+          <tr><td>tune_note</td><td></td><td>One note on the tune</td></tr>
+          <tr><td>instrument_note</td><td></td><td>One note on the instrument entry</td></tr>
         </tbody>
       </table>
       <p class="csv-format-note">If a tune with the same name already exists a new instrument entry is added to it. Sources, tunings, and musicians are created automatically if they don’t exist.</p>