Multi-body cases #67
Description
The Mfoil method used to have a working multi-body case (moved it over to src/assets in docs for now). Somehow the multi-body functionality broke along the way to re-formatting the package and needs to be fixed.
The Martensen method theoretically has working multi-body functionality, but we need an axial cascade test case to test the cascade version.
The Martensen planar method could also use a multi-body case, but the Martensen method can't handle blunt trailing edges, which is what the MFoil test case has. Perhaps closing the geometry would work, but we may also need to interpolate the geometry to get more panels for Martensen to be accurate.
The Hess-Smith method has the start of multi-body functionality implemented, but it is still incomplete and needs to be developed.