Rebased coeus 5.2.x

So this is a PR with the history rewritten on the coeus-5.2.x branch to do 3 things.

* Delete help.zip
* Delete release pdfs
* Restore 2 commits that appear to have been munged during the automatic SVN -> git import

Unsure what creating a PR like this will do since it shouldn't be mergable, but maybe it understands the history rewriting? Worth a try.