initial commit for slides.
FIX: Course.course
NEW: added slides app.
NEW: generating test data for slides.
Merge branch 'master' into slides
NEW: added slides to url and navigation
Merge branch 'master' into slides
NEW: added slides urls and views. not working yet, though.
NEW: added .DS_Store directories to gitignore
Merge branches 'comments' and 'master' of https://github.com/martflu/amanaman into comments
ok'ish solution for edit elements