This module handles various plots
Main plotting routine
Plots the interpolated band structure
Prepares a Xcrysden bxsf file to view the fermi surface
Plot u_matrix and u_matrix_opt to textfiles in readable format
June 2018: RM and SP Write to file the matrix elements of bvector and their weights This is used by EPW to compute the velocity. You need "write_bvec = .true." in your wannier input