Fixes up the EntityRepository to use dynamics for media as well so that *all* fields in the main table are returned so we can store this information in AdditionalData, now that this is working nicely we should make the entity repo lookup the properties for content too just like we're doing for media since these get put into AdditionalData as well and there's really not much overhead to do that.

Conflicts:
	src/Umbraco.Core/Persistence/Repositories/EntityRepository.cs