Close #118

spec/param/param_modes.spec.ts

spec/param/param_multivar.spec.ts

spec/structure/structure_cem88d.spec.ts

spec/structure/structure_cem88v.spec.ts

spec/structure/structure_cunge80.spec.ts

spec/structure/structure_test.ts

spec/structure/structure_weir_free.spec.ts

spec/value_ref/value_ref_type_section.spec.ts

src/structure/factory_structure.ts

src/structure/rectangular_structure.ts

src/structure/structure.ts

src/structure/structure_cem88d.ts

src/structure/structure_cem88v.ts

src/structure/structure_cunge80.ts

src/structure/structure_kivi.ts

src/structure/structure_props.ts