Shape description and authors

[constantinpape]

This PR includes:

• extension of the shape description based on the work by @esgomezm in Extend description #54
• update to the author fields and introduction of the parent fields

Please have a look if this reflects what we agreed upon in the meeting today and feel free to suggest changes, @esgomezm @oeway @frauzufall.

[constantinpape]

@esgomezm @frauzufall
What do you think about the changes here?
Is there still something you want to discuss in today's meeting or should we merge it before that?

[constantinpape]

@oeway @fjug @tomburke-rse @frauzufall @FynnBe @esgomezm
I updated the PR to reflect the changes to parent and data_type / data_range we discussed today.
I think this PR should include the changes necessary to finalize 0.3.0 now.

Let me know if you approve / if there is still something that needs to change from your side.

[oeway]

Ok, thanks! Could you please also take a look at #60 ?

[FynnBe]

Should we add a default eps value for zero_mean_unit_variance (and future eps kwargs elsewhere?). 0.0 or smth like 1.0e-6?
I think a value >0 would help to get closer outputs across implementations...

[fjug]

Sorry, really late... my bad...
As far as I can see, neither Tom or myself see any fundamental problem.
(But we are sure that @frauzufall might disagree in January... and that is likely good!)

[constantinpape]

Ok, I think we resolved this and I am merging this 🎉 !
We should be ready for 0.3.0 now, I will clean up issues and make a release later.