Analysis script logging

[philipstarkey]

#80 negates the need for #37 since the single print statement in question is removed, but I think that broadly we should consider adding some sort of logging infrastructure into the lyse API that can be sent to either lyse terminal and/or file (at potentially different log levels, and probably one log file per analysis script).

This way, the print debug statement could be reintroduced (with custom formatting as per #37) in a more sustainable and configurable way and expanded to other methods (like the other methods in Run and possibly also some of the figure manager code). The logger could also be made available to the analysis scripts so they can log their own information too.