Fixes, upgrade, and stuff

src/model/binary.rs

@@ -154,7 +154,7 @@ impl BinaryModel {
     fn process_items(&self, items: &[&str], sign: f64) -> Vec<(usize, f64)> {
         items
             .iter()
-            .map(|key| (self.storage.get_id(&key), sign))
+            .map(|key| (self.storage.get_id(key), sign))
             .collect()
     }
 }

src/model/difference.rs

@@ -94,7 +94,7 @@ impl DifferenceModel {
     fn process_items(&self, items: &[&str], sign: f64) -> Vec<(usize, f64)> {
         items
             .iter()
-            .map(|key| (self.storage.get_id(&key), sign))
+            .map(|key| (self.storage.get_id(key), sign))
             .collect()
     }
 }

src/model/ternary.rs

@@ -187,7 +187,7 @@ impl TernaryModel {
     fn process_items(&self, items: &[&str], sign: f64) -> Vec<(usize, f64)> {
         items
             .iter()
-            .map(|key| (self.storage.get_id(&key), sign))
+            .map(|key| (self.storage.get_id(key), sign))
             .collect()
     }
 }