remove ad slot container div
create shared 'ad slot tempalte' creator
remove html styling for commercial
and remove from books
removing unused styling
made adding of slice ad simpler
absolutely position container ad
no need for padding; correct 'js-off' class
fixing for ie9
rename spec; split long line
correct usage of createAdSlot
Merge pull request #4365 from guardian/refactor-ad-slot-html

Commercial: refactor ad slot html