support for AeroMode instantiation with sampled mode type (incl. fixes in spec file logic) + sampled and mono mode types coverage in unit tests (in test_aero_[mode,state,dist].py)

support for AeroMode instantiation with sampled mode type (incl. fixes in spec file logic) + sampled and mono mode types coverage in unit tests (in test_aero_[mode,state,dist].py) #603