old_contents: from _version import __version__, __version_info__
  
  version = __version__
  
  import config
  import runcat
  import solver_nfw
  import utilities
  import redsequence
  import chisq_dist
  import background
  import cluster
  import galaxy
  import mask
  import zlambda
  import cluster_runner
  
  
new_contents: from _version import __version__, __version_info__
  
  version = __version__
  
  import configuration
  import runcat
  import solver_nfw
  import utilities
  import redsequence
  import chisq_dist
  import background
  import cluster
  import galaxy
  import mask
  import zlambda
  import cluster_runner
  
  
subject: change from config to configuration