Corrected the geometry directory name from "triSurface" to "geometry".

Resolves bug-report https://bugs.openfoam.org/view.php?id=2529

The file extension is still ".eMesh"

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.

Basic featureEdgeMesh functionality.  Dropped intermediate edgeMesh, not serving any purpose, moved io into featureEdgeMesh.  Reads and writes from file.  Can construct self from surfaceFeatures object.  This functionality added to surfaceFeatureExtract, writing to constant/featureEdgeMesh.

Renamed edgeMesh -> primitiveEdgeMesh, featureEdgeMesh -> edgeMesh.  Will use a new, derived featureEdgeMesh class for cvMesh where there is additional functionality, i.e. querying normals adjacent for features edges and points.