Replace print with proper logging

[ma-sadeghi]

It'd be great if you could use proper logging instead of print-to-console. This is especially useful if impedance.py is being used by a third-party package that requires granular control over what gets printed/logged.

impedance.py/impedance/validation.py

Lines 99 to 100 in 558b51c

	if M % 10 == 0:
	print(M, mu, rmse(eval_linKK(elements, ts, f), Z))

[mdmurbach]

This is a great suggestion and would be a great addition to the package for better usability. Unfortunately, I don't have the bandwidth at this point to commit to making this switch, but would be a great contribution if you (or anyone else) wanted to take it on. I'll leave this issue open as a reminder for now :)