Merge branch 'quiz-export_v1.0+' into develop
Update README.md
Update README.md

Beta status note added.
bugfix: unknown variable $output
quiz_questions_in_quiz (/mod/quiz/locallib.php) replaced with quiz_has_questions (/mod/quiz/report/reportlib.php)

don't know wich function adopt functionality. anyway it just was used for check if there are any questions.
required version adopted
version bumped