HW5 grading scheme
==================

1 point -- Code ljmd.f compiles correctly
1 point -- Code ljmd completes a run, without crashing, for
           my file test.xyz, describing up to 4 particles
1 point -- total energy, linear momentum, center-of-mass,
           angular momentum correct at t=0 for my file test.xyz
1 point -- conservation laws obeyed as function of time
           for my file test.xyz
1 point -- correct eps file of a plot displaying r.m.s. of time
           that is generated for my file test.xyz