tbfMux.py needs an update

[jaycedowell]

tbfMux.py looks like it needs an update for some LSL API changes.

[jaycedowell]

@ctaylor-physics what was this about again?

[ctaylor-physics]

I think the change in 74bf68d was what was missing because I had already made that change in the tbfDeMux.py file I made.

Looking at this change (3bcb556) also could eliminate the need for a tbfDeMux.py intended to cleave the file at the frequency break. You could in principle just use the selection tools to grab either 0-2048 or 2048-4096 frequencies by making the frequency gap a non-fatal condition or adding an extra input argument.