1) Implementation of the PHonon+U code, 2) Some changes in HP.
- PHonon+U (A. Floris, S. de Gironcoli, E.K.U. Gross, I. Timrov, B. Himmetoglu, N. Marzari, M. Cococcioni). The code was ported from QE 5.0.2 to the latest version of QE, by I. Timrov with the help of A. Floris and M. Cococcioni. Many thanks for the discussions with P. Giannozzi, P. Delugas, A. Dal Corso, M. Calandra, L. Paulatto about various issues during the porting. Sorry if I forgot to mention someone.
- Some small modifications in the HP code in order to be consistent with the porting of PHonon+U and changes in LR_Modules.