add install instructions

Author: yyx990803

README.md

@@ -1,3 +1,10 @@
-Syntax highlighting for single-file [Vue.js](http://vuejs.org) components (enabled by [Vueify](https://github.com/vuejs/vueify) or [vue-loader](https://github.com/vuejs/vue-loader)).
+# Vue Syntax Highlight
+
+Syntax highlighting for single-file [Vue.js](http://vuejs.org) components (enabled by [Vueify](https://github.com/vuejs/vueify) or [vue-multi-loader](https://github.com/Q42/vue-multi-loader)).
+
+### Install
+
+- Via Package Control: search for `Vue Syntax Highlight`.
+- Manual: clone this repo into your Sublime `Packages` folder.
 
 **NOTE:** You still need to install corresponding packages for pre-processors (e.g. Jade, SASS, CoffeeScript) to get proper syntax highlighting for them.