Silicon band structure calculation

1) self-consistent calculation: file si_scf.in
use: pw.x < si_scf.in > si_scf.out

2) non-self-consistent calculation of bands: file si_bands.in
use: pw.x < si_bands.in > si_bands.out

3) post-processing of band structure. Creates file bands.dat
use: bands.x < bands.in > bands.out

4) plot bands
use: plotband.x < plotband.in

5) view the plot (use gv or any PostScript viewer)
on CSIF use: gv -orientation=landscape bands.ps
