It was detected thanks to the tests put back in business.
The results are not consistent but at least people can work with them.

[bindings][spatial/force] add bindings for force curve
TODO: implement motion curves
TODO: implement derivative of force curve (needed for L and dL)

[bugs] remove overloaded constructors, correct virtual functions, add setinitialPoint to abstract class

[utils/file-io] readMatrixFromFile()

[abstract-curve] checkRange() and setTimePeriod()

[constructor][bindings][spline] add constructor to create spline directly from python using time vector(array) and list of polynomials([matrix, matrix, matrix])

[cubic-spline] add empty constructor and python bindings

bunch of renaming and indentation.
remove safe template from curves.
remove unary_function inheritence.
rename base_classes to Polynomial, CubicSpline, AbstractCurve
TODO: check safety in debug mode.