Added an overlay test

Arrangement_on_surface_2/test/Arrangement_on_surface_2/data/test_overlay/geodesic_arcs_on_sphere/test11.txt

@@ -0,0 +1,74 @@
+5
+-1 0 0 0 -1 0 0
+-1 0 0 0 -1 -1 0
+-1 0 0 0 1 0 0
+0 -1 0 1 0 0 0
+1 0 0 0 1 0 0
+0
+5
+-1 0 0 0 -1 0 0
+-1 0 0 0 -1 1 0
+-1 0 0 0 1 0 0
+0 -1 0 1 0 0 0
+1 0  0 0 1 0 0
+0
+# BEGIN ARRANGEMENT
+# number_of_vertices
+4
+# number_of_edges
+4
+# number_of_faces
+2
+# BEGIN VERTICES
+0 4 1 -1 0 0 2
+10
+4 4 1 0 -1 -1 0
+9
+4 4 1 0 -1 1 0
+3
+4 4 1 1 0 0 0
+6
+# END VERTICES
+# BEGIN EDGES
+1 0 1 1 -1 0 0 2 0 -1 -1 0 0 -1 1 1 0 0
+10
+10
+2 0 1 1 -1 0 0 2 0 -1 1 0 0 1 1 1 0 0
+4
+4
+3 0 1 1 -1 0 0 2 1 0 0 0 0 0 1 1 0 0
+4
+4
+3 0 0 1 1 0 0 0 -1 0 0 2 0 0 1 1 0 0
+4
+4
+# END EDGES
+# BEGIN FACES
+# BEGIN FACE
+0 1
+# number_of_outer_ccbs
+0
+# number_of_inner_ccbs
+1
+# halfedges_on_inner_ccb
+4
+6 3 2 5
+# number_of_isolated_vertices
+0
+7
+# END FACE
+# BEGIN FACE
+0 1
+# number_of_outer_ccbs
+1
+# halfedges_on_outer_ccb
+4
+7 4 1 0
+# number_of_inner_ccbs
+0
+# number_of_isolated_vertices
+0
+22
+# END FACE
+# END FACES
+# END ARRANGEMENT

Arrangement_on_surface_2/test/Arrangement_on_surface_2/test_overlay.geodesic_arcs_on_sphere.cmd

@@ -8,3 +8,4 @@ data/test_overlay/geodesic_arcs_on_sphere/test07.txt
 data/test_overlay/geodesic_arcs_on_sphere/test08.txt
 data/test_overlay/geodesic_arcs_on_sphere/test09.txt
 data/test_overlay/geodesic_arcs_on_sphere/test10.txt
+data/test_overlay/geodesic_arcs_on_sphere/test11.txt