Add Yeoman installation instructions

src/views/docs/index.html

@@ -20,7 +20,14 @@
 $ curl -L https://github.com/fbrctr/fabricator/archive/master.tar.gz | tar zx --strip 1
 ```
 
-Alternatively, you can use the [Yeoman generator](https://github.com/fbrctr/generator-fabricator) to scaffold a new project for you:
+Alternatively, you can use the [Yeoman generator](https://github.com/fbrctr/generator-fabricator) to scaffold a new project for you. 
+If you haven't installed Yeoman yet, make sure to install it:
+
+```shell
+$ npm install -g yo
+```
+
+Then install and run the generator using:
 
 ```shell
 $ npm install -g generator-fabricator