test based on breed models
Merge branch 'master' of https://github.com/nens/python-subgrid

* 'master' of https://github.com/nens/python-subgrid:
  Back to development: 0.16
  Preparing release 0.15
  get_nd for strings: unaltered
  platform independent
  cleanup scripts, add runner script
  particle system
  particles and alcatraz