Tools for CamLOS closest points

[Didou09]

Create two methods with easy / explicit names in Rays:

• one to compute the geometrically closest point of each LOS to an axis (using self.set_dsino() and returning only the distance, theta and pts
• one to compute the points of minimum rho from a Plasma2D instance and returning rho, theta and the pts

[Didou09]

Fixed in devel by PR #212

[lasofivec]

Create two methods with easy / explicit names in Rays:

* one to compute the geometrically closest point of each LOS to an axis (using self.set_dsino() and returning only the distance, theta and pts

What do you mean by axis?
In any case if an axis is a line, then there is already a function that is similar to this probably.

[Didou09]

Yes, the functions in _GG are all already existing and operational, I just added extra methods to the Rays class with more explicit names from a tokamak point of view (axis = magnetic axis = circle in 3d)

Fixed