Revert "[DOCS] Replaces es attributes with Elasticsearch."

This reverts commit 959bf0d.

Author: szabosteve

docs/overview.asciidoc

@@ -1,8 +1,8 @@
 [[overview]]
 == Overview
 
-This is the official PHP client for Elasticsearch. It is designed to be a 
-low-level client that does not stray from the REST API.
+This is the official PHP client for {es}. It is designed to be a low-level 
+client that does not stray from the REST API.
 
 All methods closely match the REST API, and furthermore, match the method 
 structure of other language clients (Ruby, Python, etc). We hope that this 

docs/quickstart.asciidoc

@@ -64,7 +64,7 @@ print_r($response);
 
 The response that you get back indicates that the document was created in the 
 index that you specified. The response is an associative array containing a 
-decoded version of the JSON that Elasticsearch returns:
+decoded version of the JSON that {es} returns:
 
 [source,php]
 ----------------------------
@@ -97,7 +97,7 @@ print_r($response);
 
 
 The response contains metadata such as index, version, and so on as well as a 
-`_source` field, which is the original document you sent to Elasticsearch.
+`_source` field, which is the original document you sent to {es}.
 
 [source,php]
 ----------------------------
@@ -119,8 +119,8 @@ Array
 
 === Search for a document
 
-Searching is a hallmark of Elasticsearch, so let's perform a search.  We are 
-going to use the `match` query as a demonstration:
+Searching is a hallmark of {es}, so let's perform a search.  We are going to use 
+the `match` query as a demonstration:
 
 [source,php]
 ----------------------------
@@ -214,9 +214,9 @@ Array
 
 === Delete an index
 
-Due to the dynamic nature of Elasticsearch, the first document you added 
-automatically built an index with some default settings. Delete that index and 
-specify your own settings later:
+Due to the dynamic nature of {es}, the first document you added automatically 
+built an index with some default settings. Delete that index and specify your 
+own settings later:
 
 [source,php]
 ----------------------------
@@ -259,7 +259,7 @@ $response = $client->indices()->create($params);
 print_r($response);
 ----------------------------
 
-Elasticsearch now creates that index with your chosen settings and return an 
+{es} now creates that index with your chosen settings and return an 
 acknowledgement:
 
 [source,php]
@@ -274,8 +274,8 @@ Array
 === Wrap up
 
 That was just a crash-course overview of the client and it's syntax. If you are 
-familiar with Elasticsearch, you'll notice that the methods are named just like 
-REST endpoints.
+familiar with {es}, you'll notice that the methods are named just like REST 
+endpoints.
 
 You may also notice that the client is configured in a manner that facilitates 
 easy discovery via your IDE. All core actions are available under the `$client`