Investigate replacing Pos with Numpy vectors

[niftymaestro]

See related ticket #28 which does the same for Vector2D, Matrix2D which are used by the Fractal classes

[niftymaestro]

@EL-S @Markichu

I've looked into using Numpy vectors instead of the Pos class.

Would need to extensively refactor Drawing and originalDrawingMethods

A lot of the vector arithmetic would simplify if using a Numpy vector, however we'd have to wrap the Numpy vectors to use in the Drawing, to add the relevant methods needed, and the wrapping class would end up looking a lot like Pos. I think this issue is not quite worth doing (yet)

One improvement could be in Pos to store the coordinate internally as a Numpy vector, instead of self.x, self.y

I'll leave the issue open, but put to the bottom of the list for now.

[EL-S]

Interesting observations and I agree for now

[davidryan59]

Low priority, unless someone really wants to refactor. I'll leave it open still.