Changes for requests and quiz_question_answer_dim
Changes for requests and quiz_question_answer_dim

Moved the PRIMARY KEY to the end rather than on the field.
Change PRIMARY KEY for quiz_question_answer_dim to (id,quiz_question_id)
Added a sequential integer artificial primary key to requests
Added a unique key on the id to requests
mfishtrom/seqcanvas,jamesjonesmath/canvancement,mfishtrom/seqcanvas,jamesjonesmath/canvancement,jamesjonesmath/canvancement,mfishtrom/seqcanvas,jamesjonesmath/canvancement,jamesjonesmath/canvancement,mfishtrom/seqcanvas,mfishtrom/seqcanvas