add support for old fortran language grammars

Author: krvajal

package.json

@@ -2,7 +2,7 @@
     "name": "linter-gfortran",
     "displayName": "Modern Fortran",
     "description": "Modern Fortran language support, including syntax highlighting and error detection.",
-    "version": "0.4.2",
+    "version": "0.4.4",
     "publisher": "krvajalm",
     "engines": {
         "vscode": "^1.12.0"
@@ -36,13 +36,32 @@
                     ".F95"
                 ],
                 "configuration": "./language-configuration.json"
+            },
+            {
+                "id": "fortran",
+                "aliases": [
+                    "Fortran ",
+                    "fortran"
+                ],
+                "extensions": [
+                    ".f",
+                    ".F",
+                    ".f77",
+                    ".F77",
+                    ".FPP"
+                ]
             }
         ],
         "grammars": [
             {
                 "language": "fortran90",
                 "scopeName": "source.fortran.modern",
                 "path": "./syntaxes/fortran90.tmLanguage"
+            },
+            {
+                "language": "fortran",
+                "scopeName": "source.fortran",
+                "path": "./syntaxes/fortran.tmLanguage"
             }
         ],
         "snippets": [