Fixed language js bug
Some useful comments + more elements + newsletter

- add some space for content above the content-balloons. In that space
we would like to give a bit more info on the festival, a link to the
festival-reader in pdf,…
- below: add a link to the previous sites.
- add another balloon? (will it still be visible on regular computer
screens or do we need to make the balloons smaller?)
- Below the date field in the bottom left: add a form to submit your
email to a mailinglist