find fondamental and set bass bandwith from 0 to fundamental by default

[olivecha]

add frequency bins values in the plot and the fundamental

[olivecha]

Maybe this will fix the plot of the bass bin

[olivecha]

When the bass bin is from 0 to the fundamental, the graphic is good

[olivecha]

• Choose standards for bins and print fundamental value
• Get standard bins from octave bands

[olivecha]

Method .get_fundamental was added to compute the fundamental when it is not specified by the user.

Frequency bins values should be constant for all signal being compared, so the should not depend directly on the signal.