Added a SPARQL query to download the data.

This has to be changed to page through the results. Download it using
command line like this:

```
curl --data-urlencode query@download.sparql http://udfr.org/ontowiki/sparql/
```
Added the IRI for each item to the output.
Added download script.

**NB: I haven't actually tested downloading. But it works fine on
previously downloaded files.**
Refactored and created a script to merge the LinkedOpenData.
Added the full RDF dump.