Adding additional instructions to the Docker Engine installation/index page per discussions with @moxiegirl.

Removed the "Other Linux" heading; Changed the "Next Steps" heading to "Where to go After Installing"

Signed-off-by: Mike Brown <brownwm@us.ibm.com>

docs/installation/index.md

@@ -1,33 +1,48 @@
 <!--[metadata]>
 +++
-title = "Supported installation"
+title = "Supported installations for Docker Engine"
 description = "Lists the installation methods"
 keywords = ["Docker install "]
 +++
 <![end-metadata]-->
 
-# Supported installation
+# Install Docker Engine 
 
-Docker supports installation on the following: 
+Docker Engine is supported on Linux, Cloud, Windows, and OS X. Installation instructions are available for the following: 
 
-* [Amazon EC2 Installation](amazon)
+## On Linux
 * [Arch Linux](archlinux)
-* [Microsoft Azure platform](azure)
-* [Installation from binaries](binaries)
 * [CentOS](centos)
 * [CRUX Linux](cruxlinux)
 * [Debian](debian)
 * [Fedora](fedora)
 * [FrugalWare](frugalware)
 * [Gentoo](gentoolinux)
-* [Google Cloud Platform](google)
-* [Install on Joyent Public Cloud](joyent)
-* [Mac OS X](mac)
 * [Oracle Linux](oracle)
-* [Rackspace Cloud](rackspace)
 * [Red Hat Enterprise Linux](rhel)
-* [IBM SoftLayer](softlayer)
 * [openSUSE and SUSE Linux Enterprise](SUSE)
 * [Ubuntu](ubuntulinux)
+
+If your linux distribution is not listed above, don't give up yet. To try out Docker on a distribution that is not listed above, go here: [Installation from binaries](binaries).
+
+## On Cloud
+* [Amazon EC2 Installation](amazon)
+* [Install on Joyent Public Cloud](joyent)
+* [Google Cloud Platform](google)
+* [IBM SoftLayer](softlayer)
+* [Microsoft Azure platform](azure)
+* [Rackspace Cloud](rackspace)
+
+## On OSX and Windows
+* [Mac OS X](mac)
 * [Windows](windows)
 
+## The Docker Archives 
+Instructions for installing prior releases of Docker can be found in the following docker archives:
+[Docker v1.7](http://docs.docker.com/v1.7/), [Docker v1.6](http://docs.docker.com/v1.6/), [Docker v1.5](http://docs.docker.com/v1.5/), and [Docker v1.4](http://docs.docker.com/v1.4/).
+
+## Where to go After Installing
+* [About Docker](../misc)
+* [Support](https://www.docker.com/support/)
+* [Training](https://training.docker.com//)
+