Pylsl time correction example

[Mome]

It took me ages to realized, that I am supposed to do a time correction every time I record from different computers. It would have helped, if there were python examples including the time correction. I could make a pull request including an such example. Are you interested?

[cboulay]

Yes. I'd like to know more about the problem/confusion you faced but maybe it's better for you to make a pull request then we'll comment there.