Add Tour from contrib (#29)

Author: thejimbirch

composer.json

@@ -19,6 +19,7 @@
         "drupal/quick_node_clone": "^1.16",
         "drupal/sam": "^1.3",
         "drupal/trash": "^3",
+        "drupal/tour": "^2",
         "drupal/views_bulk_edit": "^3",
         "drupal/view_unpublished": "^1.1",
         "kanopi/saplings-full-html-editor": "^1"