LERGO-125	: True / False - marking correct answer gives indication of
wrong answer.
LERGO-122	 :True/False Question Display - question field appears twice +
create one line space between question and true/false buttons
LERGO-124	: Disabling buttons in Lesson View - Quiz Step
LERGO-127	: View Lesson - after user submitted answer and got feedback
user cannot change his answer
Lergo-114
Merge pull request #35 from lergo/lergo125

Lergo: 122-127