load multiple morphism base files

src/main.rs

@@ -151,8 +151,9 @@ fn parser(
 fn main() {
     let type_dict = Arc::new(RwLock::new(BimapTypeDict::new()));
 
+    for mb_path in std::env::args().skip(1) {
         let src = std::fs::read_to_string(
-        std::env::args().nth(1).expect("expected file name")
+            mb_path
         ).expect("read");
 
         let result = parser(type_dict.clone()).parse(src.clone());
@@ -188,3 +189,4 @@ fn main() {
             }
         }
     }
+}