Hook the integration tests into rust's test framework.

Instead of using a hacked-together shell script, use rust's test framework to do the comparison.

tests/test_template

@@ -0,0 +1,17 @@
+#[test]
+fn {name}() {{
+    let todo_org_path = "{path}";
+    let org_contents = std::fs::read_to_string(todo_org_path).expect("Read org file.");
+    let org_sexp = emacs_parse_org_document(todo_org_path).expect("Use emacs to parse org file.");
+    println!("{{}}", org_sexp);
+    let (_remaining, parsed_sexp) = sexp(org_sexp.as_str()).expect("Sexp Parse failure");
+    let (remaining, rust_parsed) = document(org_contents.as_str()).expect("Org Parse failure");
+    println!("{{:#?}}", rust_parsed);
+    let diff_result =
+        compare_document(&parsed_sexp, &rust_parsed).expect("Compare parsed documents.");
+    diff_result
+        .print()
+        .expect("Print document parse tree diff.");
+    assert!(!diff_result.is_bad());
+    assert_eq!(remaining, "");
+}}