add nonStandard option - @stefanpenner

src/babel/helpers/parse.js

@@ -22,8 +22,10 @@ export default function (opts, code, callback) {
       ranges:                      true
     };
 
-    parseOpts.plugins.jsx = true;
-    parseOpts.plugins.flow = true;
+    if (opts.nonStandard) {
+      parseOpts.plugins.jsx = true;
+      parseOpts.plugins.flow = true;
+    }
 
     var ast = acorn.parse(code, parseOpts);
 

src/babel/transformation/file/index.js

@@ -395,6 +395,7 @@ export default class File {
 
     var parseOpts = {
       highlightCode: opts.highlightCode,
+      nonStandard:   opts.nonStandard,
       filename:      opts.filename,
       plugins:       {}
     };

src/babel/transformation/file/options.json

@@ -15,8 +15,11 @@
     "hidden": true
   },
 
-  "moduleId": {
+  "moduleId": {},
 
+  "nonStandard": {
+    "type": "boolean",
+    "default": true
   },
 
   "highlightTheme": {