Better customization of optimization zones

[Jason Wang]

In general, the user should be able to specify custom annuli ranges and subsection ranges (e.g. annuli 1 goes from 10-20 pixels, annuli 2 goes from 15-35 pixels...).

Specifically we want the ability to both vary the size of the zones and to make overlapping zones.

[Jason Wang]

They should also be able to rotate with the sky.

[Jason Wang]

We could also possibly merge in the 'onesegment' functionality into here as just a specific custom annuli range where there is one segment specified due to the radial/azimuthal specifications.

[Jason Wang]

Overlapping zones which rotate with the sky are in pyklip-fm implemented in fm.py. I would say custom annuli ranges in regular pyklip are still desirable though and should be implemented.