Before I forget

[vsiri]

• [x] Change error message on homepage to be more vague because many pages can redirect there now with the @login_required
• [x] Push to heroku the new @login_required stuff
• [x] Text bleeds outside playlist (in #81)
• [x] Refresh page resubmits :\ (in #82)
• [x] Ordering breaks
• [x] Error about MAX_INT (in #81)
• [x] Highlighting the boxes when there is a hint (in #81)