user story:
As an Editor of the Demo Bundle, I want the image in the Places under /eZ-Mountains path to rely on the same image as the one on the Image Gallery in front-page

note:
This is an editorial user story.
2 ways to do this:
1- replace in the Place content type the Image with a Relation to an Image object
2- change the "gallery" ez flow block to allow the placement of places.
We opt for #1 :

• change the content type Place. Remove the Image field. Add a relation that will be used to link to images.
  then we will need to update templates for the Place content type (Full and Line, may be Embed to be check)