dedupe animation frames handling

src/sprite.rs

@@ -1,4 +1,5 @@
 use crate::{from_base36, optional_data_line, AnimationFrames, Image, Position, ToBase36};
+use crate::image::animation_frames_from_string;
 
 #[derive(Debug, Eq, PartialEq)]
 pub struct Sprite {
@@ -94,13 +95,9 @@ impl From<String> for Sprite {
 
         items.reverse();
 
-        // todo dedupe
-        let animation_frames = lines[1..].join("");
-        let animation_frames: Vec<&str> = animation_frames.split(">").collect();
-        let animation_frames: Vec<Image> = animation_frames
-            .iter()
-            .map(|&frame| Image::from(frame.to_string()))
-            .collect();
+        let animation_frames = animation_frames_from_string(
+            lines[1..].join("\n")
+        );
 
         Sprite {
             id,