Runners should now only move if another runner is already on base
Runners should now only move if another runner is already on base

Nicholas-Jason/PythonBaseballSim,SoftwarePhil/PythonBaseballSim,MaryMenges/PythonBaseballSim,SoftwarePhil/PythonBaseballSim,Nicholas-Jason/PythonBaseballSim,reidcooper/PythonBaseballSim,MaryMenges/PythonBaseballSim,reidcooper/PythonBaseballSim