Support system.import with nice handy babel plugin (#603)

* Support system.import with nice handy babel plugin

* Use a smaller import

* Use smaller imports here too

Author: tmcw

Diff for: lib/input/dependency.js

@@ -46,7 +46,10 @@ function dependencyStream(indexes, options, callback) {
         require('babel-preset-react')
       ],
       plugins: [
-        require('babel-plugin-transform-decorators-legacy').default
+        require('babel-plugin-transform-decorators-legacy').default,
+        // Required to support webpack's System.import
+        // https://github.com/documentationjs/documentation/issues/578
+        require('babel-plugin-system-import-transformer').default
       ]
     })],
     postFilter: moduleFilters.externals(indexes, options)

Diff for: package.json

@@ -9,6 +9,7 @@
   "dependencies": {
     "ansi-html": "0.0.5",
     "babel-core": "^6.17.0",
+    "babel-plugin-system-import-transformer": "2.4.0",
     "babel-plugin-transform-decorators-legacy": "^1.3.4",
     "babel-preset-es2015": "^6.16.0",
     "babel-preset-react": "^6.16.0",

Diff for: test/fixture/es6-import.input.js

@@ -1,5 +1,5 @@
 import hasEx6 from './es6-ext';
-import multiply from "./es6.input.js";
+import multiply from "./simple.input.js";
 import * as foo from "some-other-module";
 
 /**