Import/Export Libraries

[Kelketek]

Import and Export content libraries via XML.

[e-kolpakov]

It might make sense to factor out kind of helper method that would actually do the work so this method's only responsibility is to call helper with correct parameters, something like.

Helper might look something like

def import_courselike(request, subdir, fname, loader):
    ....

And be called something like

 course_items = import_courselike(request, subdir, "library.xml", import_library_from_xml)

BUt this might have no benefit over what we have now, so it's up to you :)

[e-kolpakov]

Looks good overall 👍

[e-kolpakov]

@Kelketek upstream reviewers asked to remove this entire "Tools" block from the very first PR, so you'll have to add it. I've saved a gist for you, though: https://gist.github.com/e-kolpakov/afc0942f781c63b4ca42.

Should go at the very bottom of <div class="wrapper wrapper-l">, just after closing </nav>, unless later PRs introduced other changes.