Deploy docs: Add index page for deploy docs
Deploy docs: Add standard deployment getting started guide
Deploy docs: Add overview of roles and components
Deploy docs: Add middleware options index
Deploy docs: minor fixes to the ActiveMQ config reference
Deploy docs: Minor fixes to the server config reference
Deploy docs: Add client config reference
Deploy docs: Add plugin deployment guide

This is a rewritten version of
http://projects.puppetlabs.com/projects/mcollective-plugins/wiki/InstallingPlugins
Deploy docs: Add Vagrant demo page

On further consideration, I think the project README is the proper place
for detailed docs about this toolkit, but we should have a landing page
on the website to reinforce the fact that we recommend it.
Docs: Delete content of EC2 demo page
Docs: Mention using registration as a heartbeat (server config and standard deployment)
Docs: Add deprecation warning and links to the old getting started guides

...and delete the most outdated one entirely.