… class

Adapting variable names
Adapting comments
Changing file name

…anel

…default

…default

…cellpose cyto2 and not omnipose cyto2 model

Adding example video

- CellposeSettings and OmniposeSettings inherit from an abstract class
that does everything except the model.
- Models for omnipose and cellpose are 2 separate enums, but that
implement a common interface.
- OmniposeUtils merged with CellposeUtils.
- CellposeDetector becomes an omnipose detector when provided with an
OmniposeSettings. No need for a second OmniposeDetector class.
- The detector factory and config panel classes for omnipose inherit
from their cellpose counterparts.

Fix #7

Adding docu in the README