Add DREAMS

[hugobuddel]

Add support for the wide-field imager DREAMS. Replaces #273.

Needs a bit more work

[teutoburg]

It looks like this branch was rebased anyway, so might as well have squashed all those "Update README.md" commits together to make this a bit cleaner, but then again I classify this whole thing as "whatever", so feel free to ignore.

Oh and my "👍" was more of a "agree to do this instead of the other one", I'll only look at the actual changes once review is requested, as usual...

[hugobuddel]

I found it important to keep @Astrogirlanajli 's work represented in the commits. It was kinda a non-trivial exercise to rebase from one repository into a subdirectory of another repository, but it worked. Maybe we can still squash some of the commits, but that's for later.

I'm going through the Test_codes and will probably convert some of those to example notebooks.

[teutoburg]

@hugobuddel good to see there's movement again here! Did you try squashing some of this (e.g. via a git rebase -i locally to check if it's possible to do so while keeping the original author(s)? I can also pull the branch and try it locally if you want 🙂

Oh and the other one (#273) is still open, even though you commented "closing". Is that intentional?

[hugobuddel]

I just rebased it now, first going to get it properly working