SCRIPTS: Fix bad condition for correlation factor computation

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
SCRIPTS: Fix random input data not being zero-centered

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
ALGORITHMS: Add a normalized Autocorrelation algorithm

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
ALGORITHMS: Remove out of date TODO comment

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
ALGORITHMS: Add a combed signal generator

Part of #6 and #5.

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
ALGORITHM: Fix bad assert expression in combed signal generator

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
ALGORITHMS: Add basic tests for combed signal generator

Signed-off-by: Gama <misept.dieseneuf@gmail.com>