Finished release v0.1.28.

* release/v0.1.28:
  TRIVIAL reverting the handling of \x00
  STORAGEMODEL-271 CompositeGenerator.iter_ports: catching exceptions in child generators and moving on
  STORAGEMODEL-270 fixing a regex
  TRIVIAL whitespace
  buildout.cfg: changed isolated python version to v2.7.6.6