Changing the internal representation of Point / Pointf / Point3 / Pointf3 to Eigen Matrix types:

Changed the Point3 / Pointf3 to derive from the Eigen Vec3crd / Vec3d.
Replaced the Point::concide_with() method calls with == operator.
Reduced some compiler warnings.

xs/src/libslic3r/Model.hpp

@@ -210,6 +210,7 @@ public:
 
     friend class ModelObject;
 
+//    Transform3d     transform;
     double rotation;            // Rotation around the Z axis, in radians around mesh center point
     double scaling_factor;
     Pointf offset;              // in unscaled coordinates