Problems with wires passing tangentially through surfaces

[lmdiazangulo]

When wires are passing tangentially through a surface (e.g. PEC) they must have continuity on their currents. This is, they should not be cut assuming a contact with that surface.

Things to do:

• A test must be included checking this behavior. I attach a draft case to do this. We expect low frequency results to be similar with and without a shorting plane.
• The tagnumber of the wires that touch the surface are being changed for the tagnumber of the surface. This is NOT what we want because it impossibilities the visualization of currents during post-processing. A test must be included to ensure that the tagnumber is preserved.

towel_rack_with_shorting_plate.zip

[lmdiazangulo]

A test has been added in #273 .

Tagnumber stuff is waiting completion of #243