Edited MS_sphere to optionally plot slowness surfaces for p, s1, and s2.
Edited MS_sphere to optionally plot slowness surfaces for p, s1, and s2.

pusher96/MSAT,jwookey/MSAT,alanfbaird/MSAT,alanfbaird/MSAT,jwookey/MSAT,pusher96/MSAT,jwookey/MSAT,alanfbaird/MSAT,pusher96/MSAT