Rewrite the Salt plugin page to include all content

It's suprising to have the 14.0 documentation have the general
information. This makes the landing page contain all the information and
redirects the Salt 14.0 manual to the index page.

It also fixes some links to reflect some moves.

_config.yml

@@ -81,6 +81,7 @@ plugins:
   - jekyll-feed
   - jekyll-gist
   - jekyll-paginate
+  - jekyll-redirect-from
 
 foreman_versions:
   - nightly

plugins/foreman_salt/14.0/index.html

@@ -0,0 +1,4 @@
+---
+title: Foreman Salt 14.0 Manual
+redirect_to: /plugins/foreman_salt
+---

plugins/foreman_salt/index.md

@@ -1,18 +1,40 @@
 ---
 layout: plugin_index
 title: Foreman Salt documentation
-versions: [14.0, 13.0, 12.0, 11.0, 7.0, 6.0, 5.0, 4.0, 3.0, 2.1, 2.0]
+versions: [13.0, 12.0, 11.0, 7.0, 6.0, 5.0, 4.0, 3.0, 2.1, 2.0]
 ---
 
-# Foreman Salt manuals
------------------------------
+# Foreman Salt
 
-Documentation: [Using Salt for Configuration Management](https://docs.theforeman.org/nightly/Managing_Hosts/index-foreman-el.html#Using_Salt_for_Configuration_Management_managing-hosts)
+Salt support in Foreman is implemented through two server side plugins: [foreman_salt](https://github.com/theforeman/foreman_salt) and [smart_proxy_salt](https://github.com/theforeman/smart_proxy_salt).
+There is also a Hammer plugin [hammer_cli_foreman_salt](https://github.com/theforeman/hammer_cli_foreman_salt).
+These plugins enable Foreman to manage Salt Minions, including provisioning, Salt Keys, Salt States, Salt Pillars, and Salt Grains, as well as providing advanced reporting features.
+You can schedule Salt jobs and run them recurringly.
+
+For documentation, see [Using Salt for Configuration Management](https://docs.theforeman.org/nightly/Managing_Hosts/index-foreman-el.html#Using_Salt_for_Configuration_Management_managing-hosts)
+
+## Troubleshooting the Salt Plugin
+
+If you find a bug, please file it in [Redmine](https://projects.theforeman.org/projects/salt/issues/new).
+For general support information, see [here]({{site.baseurl}}support.html).
+For more information, see [logging and reporting problems](https://docs.theforeman.org/nightly/Administering_Project/index-foreman-el.html#Logging_and_Reporting_Problems_admin)
+
+## Contributing to the Salt Plugin
+
+Follow the [same process as Foreman]({{site.baseurl}}contribute.html) for contributing.
+
+You can find the source code on GitHub for [foreman_salt](https://github.com/theforeman/foreman_salt), [smart_proxy_salt](https://github.com/theforeman/smart_proxy_salt), and [hammer_cli_foreman_salt](https://github.com/theforeman/hammer_cli_foreman_salt).
+
+You can help us to translate Foreman, the Salt Plugin, and other Foreman Plugins.
+See [Translation guide]({{site.baseurl}}contribute.html#Translations).
+
+
+## Legacy version documentation
 
 <div class='row plugin-manual'>
     {% for version in page.versions %}
 	<div class='col-md-4 center'>
-		<a href="plugins/foreman_salt/{{ version }}/index.html" class="btn-doc btn">
+		<a href="{{site.baseurl}}plugins/foreman_salt/{{ version }}/index.html" class="btn-doc btn">
 			<i class="fa fa-newspaper-o"></i>
 			<p id='manual'>{{ version }}</p>
 		</a>