Compatibility with latest version of PySB#13

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acorbat wants to merge 2 commits intosorgerlab:masterfrom acorbat:master

+9-9

Commits on Mar 27, 2020

Swapped <> operator for | in order to recover compatibility with latest version of PySB
acorbat
committed

Commits on Oct 28, 2020

Correct shared import in shen_modules
acorbat
committed