adding Big Top buttonmen to database

After changes made from 01253_big_top.sql and from the new data.button.sql I used the following:
```
SELECT button.name, button.recipe, button.btn_special, button.tourn_legal, buttonset.name
FROM button
INNER JOIN buttonset
ON button.set_id=buttonset.id
ORDER BY button.name;
```
and used diff to compare the changes.  No difference was found.  

I used a table backup dump to get changes to the buttonset table.  After sorting by name and comparing I saw no difference other than the key id number.