FEATURE: New API Method- CreateProductFeedPageable

Using API gives you flexibility… now you’ve got even more by being able to choose
the page size of your product feeds with this new API method.

Created a new pageable method in our API, CreateProductFeedPageable. Also, updated sp_GetProductFeed with being able to pass in @PageSize parameter. Users can pass in the desired page and pagesize (page size has maximum size of 500).