bit of refactoring in retailer list fetching; use only 1 API data source
parse more details from the advertisers received from the API
first commits for the retailers list as a separate page
refactoring
add missing piwik script tag; add type to piwik script tag where it was not specified
the categories in the drop down should point to diffrent links when listing retailers in a separate page
minor refactoring to make sure that reatailer filters are reset after unticking the last retailer
new template to be used where needed