update readme

Author: yyx990803

README.md

@@ -1,21 +1,20 @@
 # vue-pwa-boilerplate
 
-> A full-featured Webpack setup with hot-reload, lint-on-save, unit testing & css extraction.
-
-> This template is Vue 2.0 compatible. For Vue 1.x use this command: `vue init webpack#1.0 my-project`
+> A full-featured PWA template with webpack, hot-reload, lint-on-save, unit testing & css extraction.
 
 ## Documentation
 
-- [For this template](http://vuejs-templates.github.io/webpack): common questions specific to this template are answered and each part is described in greater detail
-- [For Vue 2.0](http://vuejs.org/guide/): general information about how to work with Vue, not specific to this template
+- This template builds on top of the main webpack template, so please refer to the [webpack template docs](http://vuejs-templates.github.io/webpack).
+
+- Check out the [official Vue.js guide](http://vuejs.org/guide/) for general information about Vue that is not specific to this template.
 
 ## Usage
 
-This is a project template for [vue-cli](https://github.com/vuejs/vue-cli). **It is recommended to use npm 3+ for a more efficient dependency tree.**
+This is a project template for [vue-cli](https://github.com/vuejs/vue-cli). **It is recommended to use npm 3+ or [yarn](https://yarnpkg.com) for a more efficient dependency tree.**
 
 ``` bash
 $ npm install -g vue-cli
-$ vue init webpack my-project
+$ vue init pwa my-project
 $ cd my-project
 $ npm install
 $ npm run dev