Merge branch 'feature/internal_queue' into feature/maxflow

Author: TonalidadeHidrica

src/internal_queue.rs

@@ -33,7 +33,8 @@ impl<T> SimpleQueue<T> {
         self.pos = 0;
     }
 
-    pub(crate) fn pop(&mut self) {
+    pub(crate) fn pop(&mut self) -> &T {
         self.pos += 1;
+        &self.payload[self.pos - 1]
     }
 }