Added a way to opt-out of the cache

Author: Nyholm

README.md

@@ -77,7 +77,12 @@ $client->connect('127.0.0.1', 6379);
 $pool = new RedisCachePool($client);
 
 $client = new \Github\Client();
-$client->useCache($pool);
+$client->addCache($pool);
+
+// Do some request
+
+// Stop using cache
+$client->removeCache();
 ```
 
 Using cache, the client will get cached responses if resources haven't changed since last time,

lib/Github/Client.php

@@ -374,14 +374,23 @@ public function addHeaders(array $headers)
     }
 
     /**
+     * Add a cache plugin to cache responses locally.
      * @param CacheItemPoolInterface $cache
      */
-    public function useCache(CacheItemPoolInterface $cachePool)
+    public function addCache(CacheItemPoolInterface $cachePool)
     {
         $this->removePlugin(Plugin\CachePlugin::class);
         $this->addPlugin(new Plugin\CachePlugin($cachePool));
     }
 
+    /**
+     * Remove the cache plugin
+     */
+    public function removeCache()
+    {
+        $this->removePlugin(Plugin\CachePlugin::class);
+    }
+
     /**
      * @param string $name
      *