[functions.spe10] added 2 -> 2x2 variant
[functions.spe10] added 2 -> 2x2 variant

This is just the unit matrix scaled by the Kx value, not the actual 2d
Spe10 data.

renemilk/DUNE-Stuff,renemilk/DUNE-Stuff,renemilk/DUNE-Stuff