added todo section

README.md

@@ -4,4 +4,10 @@ local html page, that shows a slideshow of local files with a counter overlay
 
 
 ## comments
-image rotation based on exif data only works in firefox
+image rotation based on exif data only works in firefox
+
+## todo
+ reset countdown at new start
+ option to disable slideshow
+ option to set color
+ "stop at 0" option