add: readme

Author: aOrz

README.md

@@ -0,0 +1,20 @@
+# webpack-mpvue-plugin
+
+> mpvue 资源路径解析插件
+
+## 使用示例：
+
+```js
+const MpvuePlugin = require('webpack-mpvue-asset-plugin')
+// webpack config
+{
+  entry: [],
+  output: {
+    path: path.resolve(__dirname, 'dist'),
+    filename: 'foo.bundle.js'
+  },
+  plugins: [
+    new MpvuePlugin()
+  ]
+};
+```