Merge pull request #17 from nhnent/fix/viewer-ext

fix: missing exts option and invoke method in the Viewer (close: #16)

Author: sohee-lee7

.storybook/addons.js

@@ -0,0 +1,2 @@
+import '@storybook/addon-knobs/register';
+import '@storybook/addon-actions/register';

.storybook/config.js

@@ -0,0 +1,8 @@
+import { configure } from '@storybook/vue';
+
+function loadStories() {
+  const req = require.context('../stories', true, /\.stories\.js$/);
+  req.keys().forEach(filename => req(filename));
+}
+
+configure(loadStories, module);