Link to blog post in README, clean up formatting.

Also document brew install for canvas.

README.md

@@ -1,17 +1,18 @@
 # Inspector Bokeh
 
-Experimental JavaScript library to measure blur in images.
+Experimental JavaScript library to measure blur in images. See this [blog post](http://www.codeoclock.com/2015/06/05/blur-detection-javascript/) for more info.
 
 ## Prerequisites
- * [Node.js](https://nodejs.org/)
- * [Browserify](http://browserify.org/)
+* [Node.js](https://nodejs.org/)
+* [Browserify](http://browserify.org/)
 
 ## Run with Node.js
-1. Make sure [Cairo](http://cairographics.org/) is installed in your system, the `canvas` module requires this. [How to install node-canvas](https://github.com/Automattic/node-canvas/wiki).
-2. `npm install`
-3. `node measure_blur.js path/to/image/file.jpg`
+1. Make sure [Cairo](http://cairographics.org/) is installed in your system, the [canvas](https://github.com/Automattic/node-canvas) module requires this. [How to install node-canvas](https://github.com/Automattic/node-canvas/wiki).
+   * On OS X with [Homebrew](http://brew.sh/): `brew install pkg-config cairo pango libpng jpeg giflib`
+1. `npm install`
+1. `node measure_blur.js path/to/image/file.jpg`
 
 ## Prepare and run browser demo - under construction
 1. `npm install`
-2. `browserify measure_blur_browserify.js > measure_blur_browser.js`
-3. Open `demo.html` in your browser.
+1. `browserify measure_blur_browserify.js > measure_blur_browser.js`
+1. Open `demo.html` in your browser.