Replace sprites with lossless webp

Author: Firepal

duck.js

@@ -1,6 +1,6 @@
 var oggduck = "data:audio/ogg;base64,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"
-var imgduck = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAALCAIAAAAr0JA2AAAATUlEQVQY02NgIA4wwlkS/6GMF4y41cEV4VHKwMDA8L+D4X8HVDWaHgiXCaII03Y0LnZ70cALRgYmAg6CASaCIQIxgonk8MPqSoLuQQcAY8QT57e+oBAAAAAASUVORK5CYII="
-var imgduckopen = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAALCAIAAAAr0JA2AAAAUElEQVQY04WQwQ0AIAgDW6dwZEdlC3ygiZYo9yJNhYvEpvsajMhQSp8qAPiAj9WWN0GLUr4uCXN03o3E+PATjGiF+On3J1bUvev/XpaljzIBKdAW0XiJ9NIAAAAASUVORK5CYII="
+var imgduck = "data:image/webp;base64,UklGRjwAAABXRUJQVlA4TC8AAAAvDIACEAoFbRs5D/9Z7wUhUQUCSRj7ix79nwCeW3rheqrHYiMk0UUBLwE+8YEdzwA="
+var imgduckopen = "data:image/webp;base64,UklGRjwAAABXRUJQVlA4TDAAAAAvDIACEAoFbRs5D/9Z7wUhUQUCSRj7ix79nwCgpZxdT/VYnJLoRtadi5cAn/jAjmc="
 
 function cssAddClass( foo ) {
 	let style_node = document.getElementsByTagName('style')[0]