improve installation docs

docs/installation.md

@@ -1,32 +1,52 @@
 # Installation
 
+### CDN
+
+If you're new to Javascript or just want a very simple setup to get your feet wet, you can get Mithril from a [CDN](https://en.wikipedia.org/wiki/Content_delivery_network):
+
+```
+<script src="http://cdn.rawgit.com/lhorie/mithril.js/rewrite/mithril.js"></script>
+```
+
+---
+
 ### NPM
 
 #### Quick start
 
 ```
-#install
+# 1) install
 npm install mithril@rewrite --save
 
-# add this line into the scripts section in package.json
+# 2) add this line into the scripts section in package.json
 #	"scripts": {
 #		"build": "bundle index.js --output app.js --watch"
 #	}
 
-# create an `index.js` file
+# 3) create an `index.js` file
 
-# run bundler
+# 4) run bundler
 npm run build
 ```
 
 #### Step by step
 
+For production-level projects, the recommended way of installing Mithril is to use NPM.
+
 NPM (Node package manager) is the default package manager that is bundled w/ Node.js. It is widely used as the package manager for both client-side and server-side libraries in the Javascript ecosystem. Download and install [Node.js](https://nodejs.org); NPM will be automatically installed as well.
 
-To use Mithril via NPM:
+To use Mithril via NPM, go to your project folder, and run `npm init --yes` from the command line. This will create a file called `package.json`.
 
-- go to your project folder, and run `npm init --yes` from the command line. This will create a file called `package.json`.
-- run `npm install mithril@rewrite --save`. This will create a folder called `node_modules`, and a `mithril` folder inside of it. It will also add an entry under `dependencies` in the `package.json` file
+```
+npm init --yes
+# creates a file called package.json
+```
+
+Then, run `npm install mithril@rewrite --save` to install Mithril. This will create a folder called `node_modules`, and a `mithril` folder inside of it. It will also add an entry under `dependencies` in the `package.json` file
+
+```
+npm install mithril@rewrite --save
+```
 
 You are now ready to start using Mithril. The recommended way to structure code is to modularize it via CommonJS modules: