online motion-energy computation about pymoten

[marklescroart]

I agree that this is a good idea, have been working on something like this for my own purposes. This seems best accomplished with a wrapper to the main code. This would keep the focus of the code on computing motion energy, not on bookkeeping stuff (what to load, when to load it). Also, if there were such a wrapper function, it could readily be applied to other preprocessing functions (e.g. possibly DNN features, etc)