runReplicate function

This is the function that runs the main body, or meaningful execution, of SHAPE experiments. In other words this is the main work-horse function that calls all the other parts and will execute you simulation run. It has the main parts of: 1. Stochastic Events; 2. Deaths; 3. Births; 4. Mutations; and during mutations this is where the mutational landscape is queried and updated as required. NOTE: Many of its internal operations are controlled by options with the suffix "shape_" and are not explicitly passed as arguments at call to this function.