Update docs for 2.0 dependency changes

Mention requirement to install canvas, jsdom, and xmldom alongside
canvg for use in a server context.

Mention usage of canvg in a built browser application.

Update CDN links for rgbcolor and stackblur-canvas to use jsdelivr.

CHANGELOG.md

@@ -1,7 +1,7 @@
 # Change Log
 
 ## v2.0.0 (beta)
-- **Breaking change**: now dependent on [canvas 2.x](https://github.com/Automattic/node-canvas)
+- **Breaking change**: for use on server, peer dependencies [canvas 2.x](https://github.com/Automattic/node-canvas), [jsdom 13.x](https://github.com/jsdom/jsdom) and [xmldom 0.x](https://github.com/jindw/xmldom) must be installed.
 - Implement focal gradient radius ([#675](https://github.com/canvg/canvg/pull/675))
 - Fixes 0 height rects ([#674](https://github.com/canvg/canvg/pull/674))
 - Fixes masks with alpha ([#672](https://github.com/canvg/canvg/pull/672))

README.md

@@ -43,30 +43,35 @@ Locally, you can run `npm start` and view the examples at [http://localhost:3123
 
 ## Usage on the server
 
-`npm install canvg`
+`npm install canvg@^1.5`
 
 **2.0.0 beta** (see [CHANGELOG](https://github.com/canvg/canvg/blob/master/CHANGELOG.md))
 
-`npm install canvg@2.0.0-beta.0`
+`npm install canvg@2.0.0-beta.0 canvas@^2 jsdom@^13 xmldom@^0`
 
-## Usage on the Browser
+The dependencies required on the server only are peers so must be installed
+alongside the canvg package.
 
-Include the following files in your page:
+## Usage on the browser
+
+For browser applications with a build process, canvg can be installed using `npm` similar to use on the server. Note in this case the peer dependencies are not required so do not need to be installed.
+
+Alternatively, canvg can be included directly into a webpage:
 ```html
 <!-- Required to convert named colors to RGB -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/canvg/1.4/rgbcolor.min.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/rgbcolor@^1/index.js"></script>
 <!-- Optional if you want blur -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/stackblur-canvas/1.4.1/stackblur.min.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/stackblur-canvas@^1/dist/stackblur.min.js"></script>
 <!-- Main canvg code -->
 <script src="https://cdn.jsdelivr.net/npm/canvg/dist/browser/canvg.min.js"></script>
 ```
 
 For the **2.0.0 beta** (see [CHANGELOG](https://github.com/canvg/canvg/blob/master/CHANGELOG.md)), use this:
 ```html
 <!-- Required to convert named colors to RGB -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/canvg/1.4/rgbcolor.min.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/rgbcolor@^1/index.js"></script>
 <!-- Optional if you want blur -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/stackblur-canvas/1.4.1/stackblur.min.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/stackblur-canvas@^1/dist/stackblur.min.js"></script>
 <!-- Main canvg code -->
 <script src="https://cdn.jsdelivr.net/npm/canvg@2.0.0-beta.0/dist/browser/canvg.min.js"></script>
 ```