Arclength

This first implementation of arclength parametrization seems to be working properly. I tried with my own Curve tools which I've put in the utilities directory
Because I made a mistake while I was testing the code. Now I reput it the way it was.

Il giorno 05/dic/2014, alle ore 16:20, Luca Heltai <notifications@github.com> ha scritto:

> In interfaces/lagrange_vector_space.py:
> 
> > @@ -1,6 +1,6 @@
> >  import numpy as np
> >  from scipy.interpolate import lagrange
> > -from interfaces.vector_space import VectorSpace
> Why did you have to change this?
> 
> —
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