removed hx effectiveness graph, moved top level model layout behind subsystem details
removed hx effectiveness graph, moved top level model layout behind subsystem details

jcchin/Hyperloop,kishenr12/Hyperloop,malachiw7/OpenMDAO-Hyperloop,whiplash01/Hyperloop,UwHyperloop/Hyperloop,jcchin/Hyperloop,paulopperman/Hyperloop,UwHyperloop/Hyperloop,whiplash01/Hyperloop,paulopperman/Hyperloop,HyperloopTeam/Hyperloop,JustinSGray/Hyperloop,malachiw7/OpenMDAO-Hyperloop,HyperloopTeam/Hyperloop,JustinSGray/Hyperloop,kishenr12/Hyperloop