Add an initial treatment of automatic node creation that we're using to upload articles and exercises
Add collectioncreator for adding things to collections automatically
Change the code in collection_confirm_attachment to work in a more transactional way, by adding a collection_confirm_attachment_body function that does the database part.  This is useful for scripted interaction.
Merge branch 'master' of github.com:KWARC/planetary
latexml error handling
added rudimentary error reporting in mmt