added GirderTool28.py for blender
added GirderTool28.py for blender

ProkopHapala/SimpleSimulationEngine,ProkopHapala/SimpleSimulationEngine,ProkopHapala/SimpleSimulationEngine,ProkopHapala/SimpleSimulationEngine,ProkopHapala/SimpleSimulationEngine,ProkopHapala/SimpleSimulationEngine,ProkopHapala/SimpleSimulationEngine