add controls to subplot()

[mahtin]

Is your feature request related to a problem? Please describe.
No - not a problem. It's an honest-to-gosh simple request to make life easier.

When you call plot() you create a new window. Two calls, two windows created. If you could pass subplot() arguments to the underlying subplot() call, then you could control the layout with minimal extra code.

Describe the solution you'd like
Add **kwargs to plot() call such that subplot() can be controlled. I believe the following simple edit would work:

def plot(self, **kwargs):
    ...
    fig, axis = plt.subplots(**kwargs)
    ...

Describe alternatives you've considered
While it's very easy to loop and call subplot() myself, I feel that the cool way plot() was implemented should be retained; but with these added controls.

[4n4nd]

@mahtin that seems like a reasonable solution. Would you please make the changes and create a pull request for it?

Thanks!

[mahtin]

Would you ...

Yes. Done. See #253