Added step of refinement the coarser of the two shapes meshes to produce two meshes with approximately the same density.
Added tests lowalgos/proximity.
Fixed accounting of parameters to adjust number of initial sample points
Extend "proximity" command to be able to compute the proximity value;
Implement classes for calculate proximity value between two shapes;
Add possibility to set up the number of sample points for the input shapes;
Add tests lowalgos/proximity.