cyclus/cyclus — pull request #849 by rwcarlsen (2014-05-17 19:28:27+00:00)
Title: implement trackid's and added product+material id bumping tests.

This adds a separate (track) id to resources that tracks as if it were a
pointer to the object instance. The trackid for a resource object in memory
will not change; unlike the (graph/db) id that changes with any/every
state-changing operation performed on the resource.

also closes #647 and #812