Redirect culturehack.org.uk/data to data.culturehack.org.uk

[mildlydiverting]

Currently http://www.culturehack.org.uk/data resolves to http://culturehack.org.uk/2012/06/16/data-sets-by-type/

it should probably be changed to resolve to
http://data.culturehack.org.uk

Assigning to @jamesjefferies for whenever he has a moment, is low priority