These conventions should be followed in all code:

 * http://code.google.com/p/soc/wiki/PythonStyleGuide
  * Limit line length to 80 characters
 * Use " " for strings, UNLESS the string contains a ", in which case use '
 * All functions outside of classes should have the prefix shn_<Model Name>_
 * All classes which over-ride existing classed should have the suffix "S3"