Saving changes
Merge branch 'master' into testing
Pseudo-slide_descriptions are now properly generated for non-edited slides, so we aren't doing the image/video search again. Still need to find a way to recycle the created base slides within the original generators (or just plain avoid creating them in the first place), since new youtube/image generators are created for each slide_description object anyway (keeping this format, in case we decide to allow user manual uploads in the future).