Structure of the input data:
===============================================================================
&inputgw
...
/

Frequencies
...
/

K_points
...
/


K_Points
========================================================================
Line of input:
      nqs
      xq(1)  xq(2)  xq(3)
   DESCRIPTION OF ITEMS:
      +--------------------------------------------------------------------
      Variable :      nqs
      Type:           INTEGER
      Description:    number of q points 

      Variables:      xq(1)  xq(2)  xq(3)

      Type:           REAL
      Description:    The electric field wavevectors, or the point at which
                      Sigma_{q} is calculated in units of 2pi/a0
                      (a0 = lattice parameter).
      +--------------------------------------------------------------------
===End of line-of-input=================================================