Add information for Raspberry Pi Image (#995)

* Add information for Raspberry Pi Image, installation and general Raspberry Pi information update.

source/getting-started/installation-raspberry-pi.markdown

@@ -1,6 +1,6 @@
 ---
 layout: page
-title: "Raspbian Lite on a Raspberry Pi"
+title: "Manual installation on a Raspberry Pi"
 description: "Instructions to install Home Assistant on a Raspberry Pi runnning Raspbian Lite."
 date: 2016-09-05 16:00
 sidebar: true
@@ -11,6 +11,14 @@ footer: true
 
 ### {% linkable_title Installation %}
 
+There's currently three documented ways to install Home Assistant on a Raspberry Pi.  
+ - [Manual installation](/getting-started/installation-raspberry-pi/#Manual-Installation). Following this guide doing each step manually. This is highly recommended as a first installation since you get a good overview of the installation.
+ - [Hassbian image](/getting-started/installation-raspberry-pi-image). Basic installation with the same settings as following the manual installation guide. Some additional software is preinstalled to make installation quicker and easier.
+ - [All-in-One Installer](/getting-started/installation-raspberry-pi-all-in-one/). Fabric based installation script that installs and compiles many of the things an advanced Home Assistant install is likely to need.
+
+
+### {% linkable_title Manual Installation %}
+
 This installation of Home Assistant requires the Raspberry Pi to run [Raspbian Lite](https://www.raspberrypi.org/downloads/raspbian/).
 The installation will be installed in a [Virtual Environment](/getting-started/installation-virtualenv) with minimal overhead. Instructions assume this is a new installation of Raspbian Lite.