Significant improvement to eval routine and tests

tests/test_func.rs

@@ -352,6 +352,36 @@ mod func_tests {
         }
     }
      */
+
+    #[test]
+    fn eval_lazy_func_call() {
+
+    }
+
+    #[test]
+    fn sym_loose_func_call() {
+
+    }
+
+    #[test]
+    fn too_many_args() {
+
+    }
+
+    #[test]
+    fn not_enough_args() {
+
+    }
+
+    #[test]
+    fn bad_eval_arg() {
+
+    }
+
+    #[test]
+    fn bad_eval_fn_body() {
+
+    }
 }
 
 /* TESTING TODO: