Change recommended links to jsDelivr (#1134)

* Change recommended links to jsDelivr

* Replace cdn links in other files

* Fix formatting and add unpkg

* Change a link from .com to .net

Author: LukasDrgon

src/v2/guide/comparison.md

@@ -111,7 +111,7 @@ React is renowned for its steep learning curve. Before you can really get starte
 While Vue scales up just as well as, if not better than React, it also scales down just as well as jQuery. That's right - all you have to do is drop a single script tag into a page:
 
 ``` html
-<script src="https://unpkg.com/vue"></script>
+<script src="https://cdn.jsdelivr.net/npm/vue"></script>
 ```
 
 Then you can start writing Vue code and even ship the minified version to production without feeling guilty or having to worry about performance problems.

src/v2/guide/index.md

@@ -17,7 +17,7 @@ If you are an experienced frontend developer and want to know how Vue compares t
 The easiest way to try out Vue.js is using the [JSFiddle Hello World example](https://jsfiddle.net/chrisvfritz/50wL7mdz/). Feel free to open it in another tab and follow along as we go through some basic examples. Or, you can <a href="https://gist.githubusercontent.com/chrisvfritz/7f8d7d63000b48493c336e48b3db3e52/raw/ed60c4e5d5c6fec48b0921edaed0cb60be30e87c/index.html" target="_blank" download="index.html">create an <code>index.html</code> file</a> and include Vue with:
 
 ``` html
-<script src="https://unpkg.com/vue"></script>
+<script src="https://cdn.jsdelivr.net/npm/vue"></script>
 ```
 
 The [Installation](installation.html) page provides more options of installing Vue. Note: We **do not** recommend that beginners start with `vue-cli`, especially if you are not yet familiar with Node.js-based build tools.

src/v2/guide/installation.md

@@ -35,9 +35,9 @@ Simply download and include with a script tag. `Vue` will be registered as a glo
 
 ### CDN
 
-Recommended: [https://unpkg.com/vue](https://unpkg.com/vue), which will reflect the latest version as soon as it is published to npm. You can also browse the source of the npm package at [https://unpkg.com/vue/](https://unpkg.com/vue/).
+Recommended: [https://cdn.jsdelivr.net/npm/vue](https://cdn.jsdelivr.net/npm/vue), which will reflect the latest version as soon as it is published to npm. You can also browse the source of the npm package at [https://cdn.jsdelivr.net/npm/vue/](https://cdn.jsdelivr.net/npm/vue/).
 
-Also available on [jsDelivr](https://cdn.jsdelivr.net/npm/vue/dist/vue.js) or [cdnjs](https://cdnjs.cloudflare.com/ajax/libs/vue/{{vue_version}}/vue.js), but these two services take some time to sync so the latest release may not be available yet.
+Also available on [unpkg](https://unpkg.com/vue) and [cdnjs](https://cdnjs.cloudflare.com/ajax/libs/vue/{{vue_version}}/vue.js) (cdnjs takes some time to sync so the latest release may not be available yet).
 
 ## NPM
 
@@ -67,7 +67,7 @@ $ npm run dev
 
 ## Explanation of Different Builds
 
-In the [`dist/` directory of the NPM package](https://unpkg.com/vue@latest/dist/) you will find many different builds of Vue.js. Here's an overview of the difference between them:
+In the [`dist/` directory of the NPM package](https://cdn.jsdelivr.net/npm/vue/dist/) you will find many different builds of Vue.js. Here's an overview of the difference between them:
 
 | | UMD | CommonJS | ES Module |
 | --- | --- | --- | --- |
@@ -84,7 +84,7 @@ In the [`dist/` directory of the NPM package](https://unpkg.com/vue@latest/dist/
 
 - **Runtime**: code that is responsible for creating Vue instances, rendering and patching virtual DOM, etc. Basically everything minus the compiler.
 
-- **[UMD](https://github.com/umdjs/umd)**: UMD builds can be used directly in the browser via a `<script>` tag. The default file from Unpkg CDN at [https://unpkg.com/vue](https://unpkg.com/vue) is the Runtime + Compiler UMD build (`vue.js`).
+- **[UMD](https://github.com/umdjs/umd)**: UMD builds can be used directly in the browser via a `<script>` tag. The default file from jsDelivr CDN at [https://cdn.jsdelivr.net/npm/vue](https://cdn.jsdelivr.net/npm/vue) is the Runtime + Compiler UMD build (`vue.js`).
 
 - **[CommonJS](http://wiki.commonjs.org/wiki/Modules/1.1)**: CommonJS builds are intended for use with older bundlers like [browserify](http://browserify.org/) or [webpack 1](https://webpack.github.io). The default file for these bundlers (`pkg.main`) is the Runtime only CommonJS build (`vue.runtime.common.js`).
 

src/v2/guide/typescript.md

@@ -14,7 +14,7 @@ We plan to move all official declarations to use ES-style exports in the future.
 
 A static type system can help prevent many potential runtime errors, especially as applications grow. That's why Vue ships with [official type declarations](https://github.com/vuejs/vue/tree/dev/types) for [TypeScript](https://www.typescriptlang.org/) - not only in Vue core, but also for [vue-router](https://github.com/vuejs/vue-router/tree/dev/types) and [vuex](https://github.com/vuejs/vuex/tree/dev/types) as well.
 
-Since these are [published on NPM](https://unpkg.com/vue/types/), and the latest TypeScript knows how to resolve type declarations in NPM packages, this means when installed via NPM, you don't need any additional tooling to use TypeScript with Vue.
+Since these are [published on NPM](https://cdn.jsdelivr.net/npm/vue/types/), and the latest TypeScript knows how to resolve type declarations in NPM packages, this means when installed via NPM, you don't need any additional tooling to use TypeScript with Vue.
 
 ## Recommended Configuration