Readme + Wiki update

[marc-vdm]

• Update wiki
• Update wiki section of CONTRIBUTING.md
• Update README.md moved a lot of information to the wiki
• Update PR template to include reference to wiki
• Added option to the Help menu in Activity Browser to open Wiki in browser
• Resolve ISO/BW terminology: Align naming to BW #1277 (added reference to this page in wiki)

Checklist

• Keep pull requests small so they can be easily reviewed.
• Update the documentation, please follow the numpy style guide.
• Update tests.
• Categorize the PR by setting a good title and adding one of the labels:
  bug, feature, ui, change, documentation, breaking, ci
  as they show up in the changelog.
• Link this PR to related issues by using closing keywords.
• Add a milestone to the PR (and related issues, if any) for the intended release.
• Request a review from another developer.

[coveralls]

coverage: 54.237% (+0.1%) from 54.118%
when pulling 91e61a4 on marc-vdm:wiki_update
into da34ce9 on LCA-ActivityBrowser:main.