Make pickable point size settable.
Add PickablePnts::getAllPnts() method.

Also reformat tabs to spaces for member variables.
Change default DrawObj point size.
Add new DrawObj enums for vertex selection and manipulation
Add SelectedPnt::_predraw() method
Add CloseCallBack to ScreenBase
Add selection manipulation to Scene
Re-arrange rendering and add generic feedback mechanism.
Add highlightDrawObj to MeshGeom
Call MeshGeom::Update in BuildNascartMesh

Not sure why this is here.  Possibly to update bounding box.
Change wing to use LE reference, simplify and correct Sweep handling.
Fix dihedral rotation offset.

Dihedral rotation was canceling out dihedral itself.
Sign error in dihedral rotation.  Rotate root airfoil full dihedral angle.
Remove now unused global_y_offset from WingGeom::UpdateSurf()
Fix problems with JPEG Screen Capture.

writeJPEG needed w+1 and h+1 to get rid of scan progression.

Then, the image was flipped vertically because of the differences
in the OpenGL coordinates and JPEG coords.
Improve quality of JPEG screen capture.
Flip JPG files vertically when loaded.