pulled instance functions out into the prototype. added code docs.
added getAddButton() method to bottom toolbar. added skeleton implementation of the "Create new sequence block" dialog.
added skeleton markup for the "Add new sequence block" dialog.
included "add sequence block" partial into page template.
added "create new sequence block" dialog instance in the application environment, added getter method for it and rigged it to the "Add" button in the bottom toolbar.
added academic levels to output array in index action. improved code docs.