more reasonable values for etamin, etamax in equations of state
including pext pmin pmax in ANOES call)
baselining polytropic_planet
	modified:   SpheralPlayground/usage_notes.md
modified:   Benchmarks/polytropic_planet.py
adding h to plan_arr for better estimate of planet surface
interim commit
interim commit
interim commit
implemented pflatten_node_list_list
Merge branch 'master' into develop