Lergo-167 : make 'media' on quizitem an object which contains all info
Lergo-273 : add hints/tips to fields "question" and "help text"
Lergo-278 : In true/ false question when user gives an incorrect answer,
the correct answer is "true/false" needs to be localized
Merge pull request #116 from lergo/lergo-267

Lergo-167 : make 'media' on quizitem an object which contains all info