- new method GetNodeArea will return the area of a node for a given direction
- methods Calc_ECPos & Calc_EffMatPos now const
- Calc_EffMatPos in Operator class updated to use new functions GetMeshDelta & GetNodeArea
- Calc_EffMatPos introduced (fixed) in Operator_Cylinder (need some testing)
- treatment of E_alpha=0 at r==0 moved from Calc_ECPos to Electric-BC