implemented Users::followers (API 2.0)

Author: vimishor

docs/users.md

@@ -5,15 +5,19 @@ Get information related to an individual or team account.
 
 ### Prepare:
 ```php
-$users = new Bitbucket\API\Users();
-$users->setCredentials( new Bitbucket\API\Authentication\Basic($bb_user, $bb_pass) );
+$user = new Bitbucket\API\Users();
+$user->setCredentials( new Bitbucket\API\Authentication\Basic($bb_user, $bb_pass) );
 ```
 
 ### Get the public information associated with a user: (API 2.0)
 ```php
-$users->get($username);
+$user->get($username);
 ```
 
+### Get the list of followers: (API 2.0)
+```php
+$user->followers($username);
+```
 
 
 ----

lib/Bitbucket/API/Users.php

@@ -35,6 +35,20 @@ public function get($username)
         );
     }
 
+    /**
+     * Get the list of followers.
+     *
+     * @access public
+     * @param  string           $username
+     * @return MessageInterface
+     */
+    public function followers($username)
+    {
+        return $this->getClient()->setApiVersion('2.0')->get(
+            sprintf('users/%s/followers', $username)
+        );
+    }
+
     /**
      * Get account
      *

test/Bitbucket/Tests/API/UsersTest.php

@@ -38,6 +38,24 @@ public function testGetUserPublicInformation()
         $this->assertEquals($expectedResult, $actual);
     }
 
+    public function testGetUserFollowers()
+    {
+        $endpoint       = 'users/john-doe/followers';
+        $expectedResult = $this->fakeResponse(array('dummy'));
+
+        $client = $this->getHttpClientMock();
+        $client->expects($this->once())
+            ->method('get')
+            ->with($endpoint)
+            ->will($this->returnValue($expectedResult));
+
+        /** @var \Bitbucket\API\Users $user */
+        $user   = $this->getClassMock('Bitbucket\API\Users', $client);
+        $actual = $user->followers('john-doe');
+
+        $this->assertEquals($expectedResult, $actual);
+    }
+
     public function testGetAccountInstance()
     {
         $this->assertInstanceOf('\Bitbucket\API\Users\Account', $this->users->account());