Base classes for microscope, camera, experiment ect.

[viljarjf]

Hello,
I was reading through the project, and noticed there were multiple sets of classes which behave (and are used) as if they were subclasses of some base class, without actually being one.
Specifically: microscopes, experiments, and cameras.
Is there a reason for this? If not, I started implementing some basic base classes for these in https://github.com/viljarjf/instamatic/tree/add-inheritance.
This would help with #89 I think, by making the necessary implementation steps easier (you would just need to make a new subclass and implement the abstract members)
It should also help a little with testing, provided the subclasses are not too difficult to instantiate,(see e.g. https://github.com/viljarjf/instamatic/blob/add-inheritance/tests/test_experiments.py)

[stefsmeets]

Hi @viljarjf , you are right that this would be useful.

The reason for it is lack of skills on my side when I wrote these classes :-)

If you are willing to contribute your code, I would be happy to take a PR on this. Especially better and more complete tests are very welcome.

[stefsmeets]

Closed by #91

Thanks for contributing this @viljarjf !