Elasticsearch: The Definitive Guide is no longer maintained

We no longer maintain Elasticsearch: The Definitive Guide or this repo. These docs only
cover the 1.x and 2.x versions of Elasticsearch, which have passed their EOL
dates.

Those interested in the latest info should use the [current Elasticsearch
docs][0] instead.

I'll backport the changes to the 2.x and 1.x branches as well.

### Changes

* Updates the page header and README to clearly state the docs are no longer maintained.
* Updates the contribution guidelines to discourage pull request and issues.
* Removes a section of the title page for contributions.

[0]: https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html

Author: jrodewig

CONTRIBUTING.md

@@ -1,7 +1,11 @@
-# The Definitive Guide to Elasticsearch 
+# Elasticsearch: The Definitive Guide
+
+This repository contains the source for the legacy [Elasticsearch: The Definitive Guide](https://www.elastic.co/guide/en/elasticsearch/guide/current/index.html)
+documentation and is no longer maintained. For the latest information, see the
+<a
+href="https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html">current
+Elasticsearch documentation</a>.
 
-This repository contains the sources to the "Definitive Guide to Elasticsearch" which you can [read online](https://www.elastic.co/guide/en/elasticsearch/guide/current/index.html).
- 
 ## Building the Definitive Guide
 
 In order to build this project, we rely on our [docs infrastructure](https://github.com/elastic/docs).
@@ -26,13 +30,16 @@ The Definitive Guide is written in Asciidoc and the docs repo also contains a [s
 
 The Definitive Guide is available for multiple versions of Elasticsearch:
 
-* The [branch `1.x`](https://github.com/elastic/elasticsearch-definitive-guide/tree/1.x) applies to Elasticsearch 1.x
-* The [branch `2.x`](https://github.com/elastic/elasticsearch-definitive-guide/tree/2.x) applies to Elasticsearch 2.x
-* The [branch `master`](https://github.com/elastic/elasticsearch-definitive-guide/tree/2.x) applies to master branch of Elasticsearch (the current development version)
+* The [`1.x` branch](https://github.com/elastic/elasticsearch-definitive-guide/tree/1.x) applies to Elasticsearch 1.x
+* The [`2.x` and `master` branches](https://github.com/elastic/elasticsearch-definitive-guide/tree/2.x) apply to Elasticsearch 2.x
 
 ## Contributing
 
-Before contributing a change please read our [contribution guide](CONTRIBUTING.md).
+This repository is no longer maintained. Pull requests and issues will not be
+addressed.
+
+To contribute to the current Elasticsearch docs, refer to the [Elasticsearch
+repository](https://github.com/elastic/elasticsearch/).
 
 ## License
 

README.md

@@ -47,16 +47,9 @@ <h3 class="author">
    </strong>
   </p>
   <p>
-   If you would like to purchase an eBook or printed version of this book once it is complete, you can do so from O'Reilly Media:
+   If you would like to purchase an eBook or printed version of this book, you can do so from O'Reilly Media:
    <a class="ulink" href="http://www.oreilly.com/catalog/0636920028505" target="_top">
     Buy this book from O'Reilly Media
    </a>
   </p>
-  <p>
-   We welcome feedback – if you spot any errors or would like to suggest improvements, please
-   <a class="ulink" href="https://github.com/elasticsearch/elasticsearch-definitive-guide/issues" target="_top">
-    open an issue
-   </a>
-   on the GitHub repo.
-  </p>
- </div>
+ </div>

book-extra-title-page.html

@@ -1,4 +1,12 @@
-This information may not apply to the latest version of Elasticsearch.
-For the most up to date information, see the current version of the
-<a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html">
-Elasticsearch Reference</a>.
+<p>
+  <strong>WARNING</strong>: This documentation covers Elasticsearch 2.x. The 2.x
+  versions of Elasticsearch have passed their
+  <a href="https://www.elastic.co/support/eol">EOL dates</a>. If you are running
+  a 2.x version, we strongly advise you to upgrade.
+</p>
+<p>
+  This documentation is no longer maintained and may be removed. For the latest
+  information, see the <a
+  href="https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html">current
+  Elasticsearch documentation</a>.
+</p>