Moved general surface hopping functions to SurfaceHoppingMethods.jl #867

Job	Run time
test (Core)	15m 39s
test (Analysis)	19m 19s
test (InitialConditions)	22m 34s
test (dynamics_classical)	17m 40s
test (dynamics_mdef)	18m 21s
test (dynamics_surface_hopping)	18m 31s
test (dynamics_cme)	18m 22s
test (dynamics_mapping)	17m 30s
test (dynamics_ehrenfest)	18m 30s
test (dynamics_ensembles)	16m 14s
	3h 2m 40s

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