remove `from scipy mean` and replace calls to the mean function with np.mean()
remove `from scipy mean` and replace calls to the mean function with np.mean()

Caoimhinmg/PmagPy,lfairchild/PmagPy,lfairchild/PmagPy,Caoimhinmg/PmagPy,lfairchild/PmagPy,Caoimhinmg/PmagPy