[FBM Team] Fliegl ASW 256 v1.0.0.0

For medium sized virtual businesses
Tandem push-off wagon Fliegl ASW 256

The following was done:
- conversion to tandem chassis
- LS 19 animated tubes
- adapted further details in Blender
- Animations on LS19 standard
- Fliegl flap adapted
- Fliegl version created
- new store picture
- Landing volume: 40,000 liters
- The texture uses the well-known diffuse system