Add python code to nuspec as content files

[Tom-Kingstone]

NOTE: Depends on

Issues addressed by this PR

Closes #146

See the nuspec file for LadybugTools_Toolkit as an example and compare to changes made here.
As python bhom analytics now exists in Python_Toolkit code, this must be included in the nuspec content files as well.
(not to mention future additions to Python_Toolkit python code)

Test files

Likely will have to merge this then see if the bot produces nugets that contain the python files first

Changelog

Additional comments

[Tom-Kingstone]

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[jamesramsden-bh]

All fine

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[jamesramsden-bh]

Happy with changes

[jamesramsden-bh]

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