[editing-explainer] Add links to some TF resources. (#35)

Added a few links, including the TF's mail list archive.
You can merge this Pull Request by running:

  git pull https://github.com/AFBarstow/editing-explainer patch-4

Or you can view, comment on it, or merge it online at:

  https://github.com/w3c/editing-explainer/pull/35

-- Commit Summary --

  * Add links to some TF resources.

-- File Changes --

    M tf-charter.html (8)

-- Patch Links --

https://github.com/w3c/editing-explainer/pull/35.patch
https://github.com/w3c/editing-explainer/pull/35.diff

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/editing-explainer/pull/35