Tidy of login.
Added test data.
Improved image markdown formating.
Tidy.
Added LessonQuestionAnswers test data.
Converted quizing to Angular.
Resolved minor schema errors.
Added quiz marking.
Added feedback on marking.
Added recording and showing of completion.
Ability to update lesson questions and answers (but not create/delete)
Fixed deleting logic.
Added adding/removing questions.
Fixed deleting.