move common vue script to vue_shared directory

app/assets/javascripts/commons/vue.js → app/assets/javascripts/vue_shared/common_vue.js

 import Vue from 'vue';
-import VueResource from 'vue-resource';
-
-Vue.use(VueResource);
+import './vue_resource_interceptor';
 if (process.env.NODE_ENV !== 'production') {
   Vue.config.productionTip = false;

config/webpack.config.js

@@ -18,7 +18,7 @@ var config = {
   context: path.join(ROOT_PATH, 'app/assets/javascripts'),
   entry: {
     common:               './commons/index.js',
-    common_vue:           './commons/vue.js',
+    common_vue:           ['vue', './vue_shared/common_vue.js'],
     common_d3:            ['d3'],
     main:                 './main.js',
     blob_edit:            './blob_edit/blob_edit_bundle.js',