Results 2 comments of Anna Niemiec

I have added an option to compute Sigma mean miscentered with dblquad instead of two nested quads. Testing this on the `demo_theory_functionality_oo.ipynb` notebook, it seems to increase the speed x2....

It seems that the new implementation in the code was slower than the notebook because of the integral of the piecewise function in the definition of the profiles, and globally...