Revert "ZLP integral as an input from other method in hyperspy is calculated using the simpson rule. Now it works this way."

This reverts commit de231975ee59fa4a8f902e0e24b3891223896a1d.
Do not reshape thickness when given as a numpy array, raise an exception instead
Mention in get_number_of_effective_electrons docstring that scipy > 0.13.2 is requiered for cumulative=True
Merge pull request #2 from francisco-dlp/fix_kka

Fix kka