[cell analysis] Implement morphological statistics for NeuroML cell models

[sanjayankur31]

For example, implement these from btmorph:

https://bitbucket.org/btorb/btmorph/src/master/btmorph/btstats.py

Also ones from L-measure: https://www.nature.com/articles/nprot.2008.51 , http://cng.gmu.edu:8080/Lm/help/index.htm

(In the future, this may become part of neuroml.Cell like the other helper functions)

[Daman2461]

@sanjayankur31 Sir I would like to work on this issue can you please guide me? Thank you.

[sanjayankur31]

Hi @Daman2461 , thanks for your interest in the issue. Could you please tell us a little about what you already know about this sort of thing and then we can give you the required information?

(Please do note that we're not putting forward a project related to developing NeuroML software at GSoC this year, so if that's why you're looking at this repo, you may want to look for other projects)