MEDYAN.FilamentSiteGeneralGeneral filament site just matches monomer states
center::Int64: index of center monomer in statesstates::Vector{UInt8}: monomer states to matchMEDYAN.AnyStateSingleton type used in match in def_fila_reaction! and def_fila_tip_reaction! to match any MonomerState.
Use the exported constant anystate instead of constructing directly.
MEDYAN.anystateA special value in match in def_fila_reaction! and def_fila_tip_reaction! to match any MonomerState.