old_contents: from galpy.potential_src import Potential
  from galpy.potential_src import planarPotential
  from galpy.potential_src import verticalPotential
  from galpy.potential_src import MiyamotoNagaiPotential
  from galpy.potential_src import LogarithmicHaloPotential
  from galpy.potential_src import DoubleExponentialDiskPotential
  from galpy.potential_src import PowerSphericalPotential
  from galpy.potential_src import TwoPowerSphericalPotential
  from galpy.potential_src import plotRotcurve
  from galpy.potential_src import plotEscapecurve
  from galpy.potential_src import KGPotential
  from galpy.potential_src import interpRZPotential
  #
  # Functions
  #
  RZToplanarPotential= planarPotential.RZToplanarPotential
  RZToverticalPotential= verticalPotential.RZToverticalPotential
  plotPotentials= Potential.plotPotentials
  plotRotcurve= plotRotcurve.plotRotcurve
  plotEscapecurve= plotEscapecurve.plotEscapecurve
  
  #
  # Classes
  #
  Potential= Potential.Potential
  MiyamotoNagaiPotential= MiyamotoNagaiPotential.MiyamotoNagaiPotential
  DoubleExponentialDiskPotential= DoubleExponentialDiskPotential.DoubleExponentialDiskPotential
  LogarithmicHaloPotential= LogarithmicHaloPotential.LogarithmicHaloPotential
  PowerSphericalPotential= PowerSphericalPotential.PowerSphericalPotential
  NFWPotential= TwoPowerSphericalPotential.NFWPotential
  JaffePotential= TwoPowerSphericalPotential.JaffePotential
  HernquistPotential= TwoPowerSphericalPotential.HernquistPotential
  TwoPowerSphericalPotential= TwoPowerSphericalPotential.TwoPowerSphericalPotential
  KGPotential= KGPotential.KGPotential
  interpRZPotential= interpRZPotential.interpRZPotential
  
new_contents: from galpy.potential_src import Potential
  from galpy.potential_src import planarPotential
  from galpy.potential_src import verticalPotential
  from galpy.potential_src import MiyamotoNagaiPotential
  from galpy.potential_src import LogarithmicHaloPotential
  from galpy.potential_src import DoubleExponentialDiskPotential
  from galpy.potential_src import PowerSphericalPotential
  from galpy.potential_src import TwoPowerSphericalPotential
  from galpy.potential_src import plotRotcurve
  from galpy.potential_src import plotEscapecurve
  from galpy.potential_src import KGPotential
  from galpy.potential_src import interpRZPotential
  #
  # Functions
  #
  RZToplanarPotential= planarPotential.RZToplanarPotential
  RZToverticalPotential= verticalPotential.RZToverticalPotential
  plotPotentials= Potential.plotPotentials
  plotRotcurve= plotRotcurve.plotRotcurve
  plotEscapecurve= plotEscapecurve.plotEscapecurve
  
  #
  # Classes
  #
  Potential= Potential.Potential
  MiyamotoNagaiPotential= MiyamotoNagaiPotential.MiyamotoNagaiPotential
  DoubleExponentialDiskPotential= DoubleExponentialDiskPotential.DoubleExponentialDiskPotential
  LogarithmicHaloPotential= LogarithmicHaloPotential.LogarithmicHaloPotential
  KeplerPotential= PowerSphericalPotential.KeplerPotential
  PowerSphericalPotential= PowerSphericalPotential.PowerSphericalPotential
  NFWPotential= TwoPowerSphericalPotential.NFWPotential
  JaffePotential= TwoPowerSphericalPotential.JaffePotential
  HernquistPotential= TwoPowerSphericalPotential.HernquistPotential
  TwoPowerSphericalPotential= TwoPowerSphericalPotential.TwoPowerSphericalPotential
  KGPotential= KGPotential.KGPotential
  interpRZPotential= interpRZPotential.interpRZPotential
  
subject: add KeplerPotential to top-level