Made text-decoration rule for anchors in tiles depend on body, so that it's important enough in most themes
Updated actions and filters in main WP Tiles class
Use the standard method for enqueueing styles in the tiles admin
Made image effects and byline effects extensible
Added color overlay image effect to WP Tiles
Use default namespace for next and previous links
In gallery, don't look for current screen if not in admin context. (Solves incompatibility with WP User Front-end)