Remove old zip target, cleanup mess in wodo.texteditor zip, collect wodotexteditor files in stable build url

Collection of a few patches to adapt the current build directory layout more to the new products:

Old zip target is no longer needed now that CI has migrated to build the product-* targets. So one commit to remove it simply.

Current zip of wodo.texteditor has example files, howto/docs and production code all together in the toplevel dir, which makes deploying the production code harder. So there are commits in this PR to move all production code files into a subdir `wodotexteditor` and to adapt in the example files the url to load the editor component to be relative to that subdir, i.e. `wodotexteditor.js` -> `wodotexteditor/wodotexteditor.js`.
Doing so means that the example files also no longer work in `build/programs/editor`, as there all files have been collected/dumped in the very same dir. So to be able to quickly test the built stuff as before, without unzipping the zip products, I propose to just use the dir where all the files for the zip are collected. Just, its name was depending on the version, so that path could not be bookmarked. A commit in this PR changes that so that `build/wodotexteditor/{texteditor,revieweditor,localeditor}.html` will be a stable path, and the versioned toplevel dir will be only set in the zip entries.
These changes do not affect session/collab-based editors which rely on `build/programs/editor/`, their files will for now still stay there. Their future is a different story, to be written separetely :)

Also includes the commit from #677