Explanation of mass_add Activity

app/views/activities/mass_new.html.haml

 .container
+  %h1
+    = t 'activities.mass_import', group: @group.name
+  .row
+    .col-md-12
+      %p
+        = t 'activities.mass_import_explanation'
+      = link_to asset_path('batch_activities.csv'), class: 'btn btn-default' do
+        = t :download
   .row
     .col-md-12
       = form_tag(group_activities_mass_new_path(@group), method: 'post', multipart: true) do
-        = file_field_tag 'spreadsheet'
-        = submit_tag
+        .form-group
+          = file_field_tag 'spreadsheet'
+        .form-group
+          = submit_tag

config/locales/activities/en.yml

     created: "Activity created."
     updated: "Activity updated."
     destroyed: "Activity destroyed."
+    mass_import: "Create multiple activities in %{group}"
     mass_imported: "%{count} activities created!"
 
+    mass_import_explanation: "Download the example file using the link below, fill in the fields (end and deadline are optional), and upload the file using the upload form."
+
     upcoming_yours: "Upcoming activities organized by you"
     yours: "Your activities"
 

config/locales/activities/nl.yml

     created: "Activiteit aangemaakt."
     updated: "Activiteit bijgewerkt."
     destroyed: "Activiteit verwijderd."
+    mass_import: "Meerdere activiteiten aanmaken in %{group}"
     mass_imported: "%{count} activiteiten aangemaakt!"
 
+    mass_import_explanation: "Download het voorbeeldbestand via de link hieronder, vul de velden in in het formaat zoals het staat aangegeven (einde en deadline zijn niet verplicht), en upload het via de knop onderaan."
+
     upcoming_yours: "Aankomende activiteiten georganiseerd door jou"
     yours: "Jouw activiteiten"