build and install instructions update

Author: localjo

README.md

@@ -1,14 +1,16 @@
 A Google Chrome developer tools extension for use by [Solidus](https://github.com/solidusjs/solidus) developers. Provides real-time introspection of API data and access to Solidus server error logs for use in debugging preprocessors executed in the Node.js runtime environment.
 
-**Note:** This is still a work in progress, use at your own risk.
-
-#Build
+#Clone
 * Clone the repo with `git clone https://github.com/solidusjs/devtools-solidus.git devtools-solidus`
-* Run `npm install` to install dependencies (npm will automatically run a script to install front-end dependencies using bower).
-* (Optional) Chrome will complain about `.pem` files in some of the dependencies, so you can manually delete `node_modules/socket.io-client/node_modules/engine.io-client/node_modules/ws/test/` to prevent Chrome from warning you when you install the extension.
 
 #Installation
-* Open chrome://extensions
-* Enable 'Developer Mode' checkbox
-* Click 'Load unpacked extensions...'
-* Select the `devtools-solidus` folder
+* Find the `.crx` file you want in the `dist/` directory. We recommend using the latest version, or you can manually build your own (see below).
+* Open <chrome://extensions> in Chrome
+* Drag and drop the `.crx` file onto the page and click "Add" to install.
+
+#Manually Build
+* Run `npm install` to install dependencies (npm will automatically run a script to install front-end dependencies using bower).
+* Run `grunt build` to generate an installable `.crx` file in the `dist/` directory.
+
+#Usage
+* Once the extension is installed, you can open Chrome's Developer Tools and you should see a "Solidus" tab.