Cleanup references

[Jym77]

• Correct some test assets paths.
• Remove links to Facebook and Twitter. Replaced by links to ACT rules resources.
• Make all img point to existing test assets unless missing asset is needed for the example.
• Remove protocol relative URLs. All recent doc I can find consider them as anti-pattern.
• Replace http by https in links in test cases.
• Remove Inapplicable examples that fail the SC.

Closes issue(s):

• N/A

Need for Final Call:
This will require a 1 week Final Call (editorial changes to many examples).

---

Pull Request Etiquette

When creating PR:

• Make sure you're requesting to pull a branch (right side) to the develop branch (left side).

After creating PR:

• Add yourself (and co-authors) as "Assignees" for PR.
• Add label to indicate if it's a Rule, Definition or Chore.
• Link the PR to any issue it solves. This will be done automatically by referencing the issue at the top of this comment in the indicated place.
• Optionally request feedback from anyone in particular by assigning them as "Reviewers".

When merging a PR:

• Close any issue that the PR resolves. This will happen automatically upon merging if the PR was correctly linked to the issue, e.g. by referencing the issue at the top of this comment.

How to Review And Approve

• Go to the “Files changed” tab
• Here you will have the option to leave comments on different lines.
• Once the review is completed, find the “Review changes” button in the top right, select “Approve” (if you are really confident in the rule) or "Request changes" and click “Submit review”.
• Make sure to also review the proposed Final Call period. In case of disagreement, the longer period wins.

Changes done.

[Jym77]

Final Call ends on October 1st.

[Jym77]

Final Call has ended. Merging.