Constant size simulations
Renamed script
Merge branch 'develop' into feature/psmc_simulations
Merge branch 'develop' into feature/psmc_simulations
Constant size results.

These estimates are so wildly wrong it is not even funny. I need to try with more data and then start with some debugging.
Slightly better plotting
Merge branch 'develop' into feature/psmc_simulations
Merge branch 'release/multiple_chunks_input' into develop
Documentation string for the forwarders.
Refactored isolation model
Refactored migration model
Got rid of wrapper objects for isolation and migration model
Refactored PSMC model and fixed a few interface bugs
Updated psmc script
Code cleanup
Merge branch 'feature/refactor_model_design' into develop
Merge branch 'develop' into feature/psmc_simulations
Moved common code to abstract base class.
Moved access to the initial state as well
Merge branch 'feature/refactor_ctmc_system' into develop