ADEN-762 SevenOne Media: No ads for IE8
ADEN-765 SevenOne Media: One prefooter as promo1
ADEN-764 SevenOne Media: SOI_KEYWORDS as requested by Daniela
ADEN-749 SevenOne Media: SOI_SUB3SITE empty string instead of false
Merge pull request #2306 from Wikia/aden-759-sevenonemedia-tweaks

ADEN-759 SevenOne Media tweaks