* Most of the changes in GeniCM are simple reorganizations to allow me
  to call into the code from the GeniCMV2 module. This is to avoid
  code duplication as much as possible. Eventually, I will have to
  duplicate the code, but for the moment this works okay.

* I am ignoring the slice_urn argument for now. Will add that later.

* See protogeni/test/version2 for the version two test cases.