Issue #1981368 by tim.plunkett, Crell, webchick: Convert all routes to 'module_name().foo_bar()' naming convention.

Issue #1788542 by claudiu.cristea, andypost, tim-e, fubhy, speely, heyrocker: Use EntityFormController and EntityListController for image styles.

Issue #1987712 by dawehner, claudiu.cristea, damiankloip, andypost: Convert file_download() to a new style controller.

Issue #1946416 by kim.pepper: Convert all of confirm_form() in image.admin.inc to the new form interface.