Tunisia v1.8

- Added Fuelled and Replacement Unit markers.
- All pieces can now be labelled.
- Removed hidden trait on piece prototypes.
- Added OCS charts.
- Added seperate map zones so pieces no longer snap to grid inside Tripoli/Sicily boxes.
- Fixed Italian Prov Arty unit.
- Fixed British 3/4 Truck.
- Fixed blue Hurri II.
- Added Scenario 5 pre-defined setup.