0.1.1 causalPresenceIndex; utils func for getting edge by cause; chaning default inits;

011 update (#7)

* included updates for version 0.1.1

* included error-db.owl and associated tests

* removed unnecessary packages and moved packages only required for testing into seperate requirements.txt

* added changes to tests/requirements.txt

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Co-authored-by: Carl Willy Mehling (GPU) <carl.willy.mehling@iwu.fraunhofer.de>