d3q Code

Herring processes simplified
Two-phonon density of state included, it is not the same thing as JDOS

Doc updated

changelog

Catching up with new wavefunction module and Makefiles changes in QE

Cross sections for neutrons should work, as long as the element appear in the list

Little cleanup of isotopic and casimir scattering, also they are now written separately to file (to be documented)

Added the capability to compute stand-alon isotopic and casimir scattering times in q2r, without the need to repat the entire lw calculation

Spectral function now correctly includes LO-TO splitting

Better format on screen output

Little cleanup