Feature topical events

Added the ability for organisations to also feature topical events with an image.

Currently only orgs (not worldwide locations) see the topical events to feature and we have added a new partial as topical events also display featured content.

Removed Draper from FeaturePresenter

https://www.pivotaltracker.com/story/show/47297159

Tech debt: 
Ideally we should refactor this to make it polymorphic so you can feature anything, but there was a deadline for tomorrow.
Refactor the views to use the same partial, requiers the EditionPresenter and FeaturePresenter to merge.