User can take Quiz

[josemvidal]

• [x] Quizes are public, just need to know URL to quiz
• [x] All questions in one screen
• [x] One submit button
• [x] User can take it multiple times

[josemvidal]

Since I can't create a quiz, I can't take any.

So, I cannot verify that this works. Re-opening.

[josemvidal]

works in new version.