new_contents: """
      Real-Space Modeling for SANS
  """ 
  ## \mainpage Real-Space Modeling for SANS
  #
  # \section intro_sec Introduction
  # This module provides SANS scattering intensity simulation 
  # based on real-space modeling.
  #
  # Documentation can be found here: 
  #    http://danse.us/trac/sans/wiki/RealSpaceModeling
  #
  # \section install_sec Installation
  #
  # \subsection obtain Obtaining the Code
  #
  # The code is available here:
  # \verbatim
  #$ svn co svn://danse.us/sans/realSpaceModeling
  #$ svn co svn://danse.us/sans/RealSpaceTopLayer
  # \endverbatim
  #
  # \subsection depends External Dependencies
  # None
  #
  # \subsection build Building the code
  # The standard python package can be built with distutils.
  # From the realSpaceModeling directory:
  # \verbatim
  #$ python setup.py install
  # \endverbatim
  #
  # From the RealSpaceTopLayer/src directory:
  # \verbatim
  #$ python setup.py install
  # \endverbatim
  #
  # \section overview_sec Package Overview
  # 
  # \subsection class Class Diagram:
  # \image html real-space-class-diagram.png
  #
  # \subsection behav Behavior Enumeration:
  # \image html enum.gif
  #
  # \subsection Tutorial
  # To create an empty canvas:
  # \verbatim
  #import sans.realspace.VolumeCanvas as VolumeCanvas
  #    canvas = VolumeCanvas.VolumeCanvas()
  # \endverbatim
  #
  # To set the simulation point density:
  # \verbatim
  #    canvas.setParam('lores_density', 0.01)
  # \endverbatim
  #
  # To add an object:
  # \verbatim
  #    sphare = VolumeCanvas.SphereDescriptor()
  #    handle = canvas.addObject(sphere)
  #    canvas.setParam('%s.radius' % handle, 15.0)
  # \endverbatim
  #
  # To evaluate the scattering intensity at a given q:
  # \verbatim
  #    output, error = canvas.getIqError(q=0.1)
  #    output, error = canvas.getIq2DError(qx=0.1, qy=0.1)
  # \endverbatim
  #
  # To get the value of a parameter:
  # \verbatim
  #    canvas.getParam('scale')
  # \endverbatim
  #
  # Examples are available as unit tests under sans.realspace.test.
  #
  # \section help_sec Contact Info
  # Code and Documentation by Jing Zhou as part of the DANSE project.
  
  
subject: create __init__.py for sans folder