makes the reparametrization of a given curve in archlength parameter
swimmer discrete curvature now computed with new way
the reparametrization is now correct, with the right curvature, both from spline and a exact formula working
changed order of spline approximation from 5 to 3
simulation for the polimeric periodic case and new swimmer
new swimmer class working with reparametrization class, periodic and nonperiodic
Vectorized the energy calculation.
add speed tests to compute the energy
symbolic to fortran energy grad and hessian. grad done, lack tests
Fast hessian and grad working and with tests!
Fortran is now the default computation type for the hessian and gradient of the energy function.