Adding surface streamlines support to vtk by :
Using a higher tolarance (*10)
2D Check of cell inclusion
Surface vortivity
Snapping stream lines point to surface

New version of the surface stream tracer

New version of the surface streamer tracer, the main point are :
1. Use of a surface tolerance scale at 1.E-5, to ensure even adaptative algorithm like RungeKutta4-5 works, however it is still possible to create dataset wich will not comply with this,
A Hard edge with a big vector will always make it fails at some point, is is more visible with surface streamlines but could occur with volume streamlines as well

2. A new version of FindCell, with a surface specific part wich almmost always find a cell, except when we are really out of domain.
It is ensured by always checking findPoint return

3. Still use surface vector

4. Snap using new version of FindCell

Note: Style is not yet considered, do not loose any time review the style.

Correcting style in new code