Add featured collections image.
Convert foreach loop to a MySQL query for collection images.
Escape object references in database query string.
Update field references.
Use the global $wpdb object.
Explode array of IDs.
Replace incorrect usage of explode with implode.
Map fields to the desired names.
Return GUID as custom size.
Merge branch 'master' of heroku.com:erdem into production

Conflicts:
	config/public/wp-content/themes/erdem/functions.php
Merge branch 'master' of github.com:wednesdaylondon/wordpress.erdem.com into production
Tidy indentation.