break graph.c out of toolkit2
toolkit2 is a temporary naming convention which requires components are broken out. graph.c is used in Simulated Ape and Simulated Urban however it shouldn't require the rest of toolkit2. Break it out accordingly.
toolkit2 is a temporary naming convention which requires components are broken out. graph.c is used in Simulated Ape and Simulated Urban however it shouldn't require the rest of toolkit2. Break it out accordingly.