Enhance edgeMesh to support more formats.
Read only support: .bdf, .nas - NASTRAN format. Handles both CBEAM and CROD as lines. CROD is what Hypermesh happens to output. Write only support: .vtk - VTK legacy format in ASCII Read/write support: .eMesh - native format, which is simply a list of points, edges with an additional IOobject header that lets them be moved about easily to use as a featureEdgeMesh. .inp - STAR-CD inp/cel/vrt combination IOobject header) .obj - Alias waverfront format Radically simplify surfaceFeatureConvert by using the new edgeMesh functionality.