lots of improvements to boundary layer generation: we can now constuct
and mesh models with entities connected to boundary layer points, edges
and faces

fix position of BoundaryLayerPoints

better destructor

* re-added all view output routines (POS, STL, MSH, TXT)

- re-add smooth() for PViewDataList

rewrote Draw_Scale

fix bug for ruled surfaces with holes (part 1)

add support for "growing" 3D spheres

new drawing cide complete (except for LCM tensor stuff--needs to be rethought
anyway)

need testing

added full supprt for tapered cylinders + make sure we have a normal for
all lines

bug fixes + add 3D lines/points

CatMullRom->Spline

add bit of code to intersect curves with a surface (allows to do "poor man's"
trimmed patches ;-)

store vectors in "pseudo" vertex arrays to avoid looping over elements
in the drawing loop