I optimized display.html and CSS
same class name for different objects is problematic
_ quiz table and question table must not be named with same class
_ surrounding tabel: class="multichoice|etc"
_ answer table: class="answer"
I changed the classname of the "answer" div to class="ablock" (short from "answer-block") that it does not conflict with "answer"
multichoice:
_ changed first row to class="r0"
_ added descriptive classes to the cells
