Partially implemented SaveModelTo3DMF() method.
Implemented X3BoundaryBox class and added a BoundaryBox property to X3Model.
Revised X3BoundingBox class structure.
Implemented X3BoundingBox.ApplyVertex() method.
X3Model.UpdateBoundingBox() method now uses the X3BoundingBox.ApplyVertex() method for calculations.
Added missing {Zoclee} branding comments.
Removed unused local variables.
Partially implemented SaveModelTo3DMF() method.
X3BoundingBox now applies positive minimum values correctly.