First steps on Honorio-Samaras algorithm
Test signals generator

Code for main algorithm has been completed, but not tested (it has not
been run at all).
Corrected some bugs in Newton-Raphson step

Adapted the formula to enforce a positive solution.
The formula used for the second derivative contained an error (bad
sign).
Algorithm works on test case.

In the current state, the algorithm converges for different test cases.

The function contains **much** code for testing and asserting, that slows
down things a lot.
Added a debugging flag

Removed some test code.