plugins added to the pre_proc plugins sequence

dream/simulation/Examples/JobShopAllInOneEmpty.json

@@ -805,8 +805,17 @@
 		"pre_processing" : {
 			"description" : "",
 			"plugin_list" : [{
-          "_class": "dream.plugins.ReadShiftFromSpreadsheet.ReadShiftFromSpreadsheet", 
-          "input_id": "ShiftSpreadsheet"
+          "_class": "dream.plugins.ReadJSSkills.ReadJSSkills", 
+          "input_id": "operator_skill_spreadsheet"
+        }, {
+          "_class": "dream.plugins.ReadJSWIP.ReadJSWIP", 
+          "input_id": "wip_spreadsheet"
+        }, {
+          "_class": "dream.plugins.ReadJSOrders.ReadJSOrders", 
+          "input_id": "production_orders_spreadsheet"
+        }, {
+          "_class": "dream.plugins.ReadJSWorkPlan.ReadJSWorkPlan", 
+          "input_id": "workplan_spreadsheet"
         }
 			]
 		},