* Make some editions use external core
* Revert tw5.com-docs use external js
* Revert "Revert tw5.com-docs use external js"
This reverts commit 93f36cb0af.
By making the docs available as a plugin we make it easier for people
to fork their own copy of the docs without losing the ability to get
updates in the future (which can be done just be updating the docs
plugin)