New injection based on surface to all geometries.

WARNING: 3DCart still not working (too tired to calculate things and I'm
    not ussing it...)

src/modules/mesh/1DCart/moduleMesh1DCart.f90

@@ -104,6 +104,7 @@ MODULE moduleMesh1DCart
       USE moduleSpecies
       USE moduleBoundary
       USE moduleErrors
+      USE moduleRefParam, ONLY: L_ref
       IMPLICIT NONE
 
       CLASS(meshEdge1DCart), INTENT(out):: self
@@ -122,6 +123,8 @@ MODULE moduleMesh1DCart
 
       self%x = r1(1)
 
+      self%surface = 1.D0 / L_ref**2
+
       self%normal = (/ 1.D0, 0.D0, 0.D0 /)
 
       !Boundary index