added optional censoring; made pdf file show up once the conversion is finished; fixed bug when pagescales are not set but no rectangles are on page

index.html

@@ -74,6 +74,8 @@
             <label for="date">Datum</label>
             <input type="date" id="date" name="ex_date" placeholder="Drop File" /><br />
           </div>
+          <input type="checkbox" name="censor" id="sec_censor" value="True" checked /><label
+            for="sec_censor">Zensieren</label><br /><br />
           <button type="submit" id="send">Senden</button>
         </form>
       </div>