PromoImage wip
new Promo Image in cross wiki
use cropped thumbnail helper
wiki service returns correct image name
add cleanup old images helper methods
fix not equal to
WikisModel return correct data
unused code cleanup wip
finalize cleanup
remove main image
Merge branch 'PromoteRefactor' into PromoteRefactor-WIP-Seba

Conflicts:
	extensions/wikia/CityVisualization/classes/PromoImage.class.php
	extensions/wikia/CityVisualization/classes/PromoXWikiImage.class.php
	extensions/wikia/CityVisualization/classes/WikiGetDataForPromoteHelper.class.php
	extensions/wikia/CityVisualization/helpers/WikiaHomePageHelper.class.php
	extensions/wikia/CityVisualization/models/CityVisualization.class.php