Convergency test for compatible communication 2D-1D.

Setting: square 2d domain, with horizonal 1D fracture; Dirichlet condition on top and bottom side,
and left and right end of the fracture; no gravity, symmetry in both directions.
Parameters: 
P2, 2D Dirichlet
P1, 1D Dirichlet
k1, 1D permeability
k2, 2D permeability
sigma - transition coef.

Main ini file: square.in
script for running all ten problems: run_scale_tests.sh

several *.pvsm files provides various settings of programable filter in Paraview
in order to compute reference analytical solution.