to be tested

- do not multiply with ε∞ (Lambin version of ωp)
- correct the index for more than one layer
- extended Drude not tested yet.

still not sure they are all correct.

All is still fine.

remove unneeded stuff.
rename and reladd layers

top is default!
also replace general subroutine files by the one relevant.

cleanup and reorder

At least a first part.

- downcase copies
- fixes sizes
- add jos in call of seteps
But still wrong results.

compiles, but mainly crashes.