convert int IDs to strings

src/item.rs

@@ -1,9 +1,9 @@
-use crate::{from_base36, optional_data_line, AnimationFrames, Image, ToBase36};
+use crate::{optional_data_line, AnimationFrames, Image};
 use crate::image::animation_frames_from_string;
 
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub struct Item {
-    pub id: u64,
+    pub id: String,
     pub animation_frames: Vec<Image>,
     pub name: Option<String>,
     pub dialogue_id: Option<String>,
@@ -32,7 +32,7 @@ impl From<String> for Item {
     fn from(string: String) -> Item {
         let mut lines: Vec<&str> = string.lines().collect();
 
-        let id = from_base36(&lines[0].replace("ITM ", ""));
+        let id = lines[0].replace("ITM ", "");
         let mut name = None;
         let mut dialogue_id = None;
         let mut colour_id: Option<u64> = None;
@@ -71,7 +71,7 @@ impl ToString for Item {
     fn to_string(&self) -> String {
         format!(
             "ITM {}\n{}{}{}{}",
-            self.id.to_base36(),
+            self.id,
             self.animation_frames.to_string(),
             self.name_line(),
             self.dialogue_line(),