add_participant API call succeeds with bad API key

```
api key is 

9172d0d7aca86fea25c84df765f577d1

changed it to 

9172d0d7aca86fea25c84df765f577e1

add_participants still works .... 

perhaps because a cookie session authenticates on another path

in any case other APIs (create / delete conference) apepar to work as expected
```

Original issue reported on code.google.com by `j...@babelroom.com` on 9 Jun 2013 at 10:11
