old_contents: import numpy as N
  import tmatrix as tmat
  from scattering import refractive_index
  m = refractive_index('water',3.0)
  ds = 5.0
  qs,fmat,bmat= tmat.tmatrix(ds/2.0,1.0,30.0,m,1.0,-1)
  
new_contents: from scattering import _tmatrix as tmat
  from scattering import refractive_index
  m = refractive_index('water',3.0)
  ds = 5.0
  qs,fmat,bmat= tmat.tmatrix(ds/2.0,1.0,30.0,m,1.0,-1)
  print qs
  print fmat
  print bmat
  
subject: Clean up quicktest to run under new layout.