added getIssueByLabel() method to model/Project and api/Issues

Author: Annie Weng

lib/Gitlab/Api/Issues.php

@@ -53,6 +53,17 @@ public function update($project_id, $issue_id, array $params)
         return $this->put($this->getProjectPath($project_id, 'issues/'.$this->encodePath($issue_id)), $params);
     }
 
+   /**
+    *@param int $project_id
+    *@param string $issue_label
+    *@return mixed
+    */
+    public function getIssueByLabel($project_id, $issue_label)
+    {
+ 
+ 	return $this->get($this->getProjectPath($project_id, 'issues?labels='.$this->encodePath($issue_label)));
+    }
+
     /**
      * @param int $project_id
      * @param int $issue_id

lib/Gitlab/Model/Project.php

@@ -756,6 +756,20 @@ public function openIssue($id)
         return $issue->open();
     }
 
+    /**
+     * @param String $label
+     * @return array()
+     */
+    public function getIssueByLabel($label)
+ 	$data = $this->api('issues')->getIssueByLabel($this->id,$label);
+ 	$issues = array();
+	foreach ($data as $issue){
+	   $issues[] = Issue::fromArray($this->getClient(), $this, $issue);
+ 	}
+ 	
+      return $issues;
+     }
+	
     /**
      * @param int $page
      * @param int $per_page