Ajout d'un bloc campus et d'un layout pour le bloc formations (#1654)

...ssets/images/communication/blocks/templates/locations.jpg

...s/images/communication/blocks/templates/programs/grid.png

...s/images/communication/blocks/templates/programs/list.png

app/assets/stylesheets/admin/pure/style.sass

app/models/communication/block.rb

app/models/communication/block/component/location.rb

app/models/communication/block/template/location.rb

app/models/communication/block/template/location/element.rb

app/models/communication/block/template/program.rb

...n/communication/blocks/components/location/_edit.html.erb

...n/communication/blocks/components/location/_show.html.erb

...ommunication/blocks/components/location/_snippet.html.erb

...communication/blocks/components/location/_static.html.erb

app/views/admin/communication/blocks/new.html.erb

...n/communication/blocks/templates/locations/_edit.html.erb

...n/communication/blocks/templates/locations/_show.html.erb

...ommunication/blocks/templates/locations/_snippet.html.erb

...communication/blocks/templates/locations/_static.html.erb

...in/communication/blocks/templates/programs/_edit.html.erb

.../communication/blocks/templates/programs/_static.html.erb