Fix heatmap issue and implement per round analysis

analysis/tests/perround.rs

@@ -0,0 +1,14 @@
+use analysis::perround;
+use pretty_assertions::assert_eq;
+
+#[test]
+fn perround_nuke() {
+    let path = concat!(env!("CARGO_MANIFEST_DIR"), "/../testfiles/nuke.dem");
+    dbg!(path);
+    let input_bytes = std::fs::read(path).unwrap();
+
+    let result = perround::parse(&input_bytes).unwrap();
+    dbg!(&result);
+
+    assert_eq!(21, result.rounds.len());
+}