Added .keep file to maintain the simulations directory
Added .keep file to maintain the simulations directory

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