cleanup adapter vs client wording

Author: dbu

README.md

@@ -7,7 +7,7 @@
 [![Quality Score](https://img.shields.io/scrutinizer/g/php-http/discovery.svg?style=flat-square)](https://scrutinizer-ci.com/g/php-http/discovery)
 [![Total Downloads](https://img.shields.io/packagist/dt/php-http/discovery.svg?style=flat-square)](https://packagist.org/packages/php-http/discovery)
 
-**Finds installed adapters and message factories.**
+**Finds installed Httplug implementations and message factories.**
 
 
 ## Install

composer.json

@@ -1,8 +1,8 @@
 {
     "name": "php-http/discovery",
-    "description": "Finds installed adapters and message factories",
+    "description": "Finds installed clients and message factories",
     "license": "MIT",
-    "keywords": ["http", "discovery", "adapter", "message", "factory"],
+    "keywords": ["http", "discovery", "client", "adapter", "message", "factory"],
     "homepage": "http://php-http.org",
     "authors": [
         {

spec/HttpClientDiscoverySpec.php

@@ -16,7 +16,7 @@ function it_is_a_class_discovery()
         $this->shouldHaveType('Http\Discovery\ClassDiscovery');
     }
 
-    function it_finds_an_http_adapter()
+    function it_finds_an_http_client()
     {
         $this->find()->shouldImplement('Http\Client\HttpClient');
     }

src/HttpClientDiscovery.php

@@ -41,11 +41,11 @@ class HttpClientDiscovery extends ClassDiscovery
     ];
 
     /**
-     * Finds an HTTP Adapter
+     * Finds an HTTP Client
      *
      * @return HttpClient
      *
-     * @throws NotFoundException
+     * @throws NotFoundException If no suitable client is available
      */
     public static function find()
     {