Add interactive content type to sport blocks

Editorial would like the new world cup interactive to show on network fronts and sport pages. 

This enables that.

http://www.theguardian.com/football/ng-interactive/2013/dec/world-cup-draw-2014-create-your-own-draw-interactive?seed=VaMAdq

n.b.
We should do some further thinking how we can filter the interactive by ones we support from the rest.