pogcal import broken because of layout change

### Expected behaviour:

Shows are imported from http://www.pogdesign.co.uk/cat/
### Actual behaviour:

Not imported :)

```
Error during input plugin pogcal: Error retrieving source: 500 Server Error: Internal Server Error for url: http://www.pogdesign.co.uk/cat/show-select
Input pogcal did not return anything
```
