Fixed all instances of static::

Author: m4tthumphrey

lib/Gitlab/Api/Groups.php

@@ -4,7 +4,7 @@
 
 class Groups extends AbstractApi
 {
-    public function all($page = 1, $per_page = static::PER_PAGE)
+    public function all($page = 1, $per_page = self::PER_PAGE)
     {
         return $this->get('groups', array(
             'page' => $page,

lib/Gitlab/Api/Issues.php

@@ -4,7 +4,7 @@
 
 class Issues extends AbstractApi
 {
-    public function all($project_id = null, $page = 1, $per_page = static::PER_PAGE)
+    public function all($project_id = null, $page = 1, $per_page = self::PER_PAGE)
     {
         $path = $project_id === null ? 'issues' : 'projects/'.urlencode($project_id).'/issues';
 

lib/Gitlab/Api/MergeRequests.php

@@ -4,7 +4,7 @@
 
 class MergeRequests extends AbstractApi
 {
-    public function all($project_id, $page = 1, $per_page = static::PER_PAGE)
+    public function all($project_id, $page = 1, $per_page = self::PER_PAGE)
     {
         return $this->get('projects/'.urlencode($project_id).'/merge_requests', array(
             'page' => $page,

lib/Gitlab/Api/Milestones.php

@@ -4,7 +4,7 @@
 
 class Milestones extends AbstractApi
 {
-    public function all($project_id, $page = 1, $per_page = static::PER_PAGE)
+    public function all($project_id, $page = 1, $per_page = self::PER_PAGE)
     {
         return $this->get('projects/'.urlencode($project_id).'/milestones', array(
             'page' => $page,

lib/Gitlab/Api/Repositories.php

@@ -20,7 +20,7 @@ public function tags($project_id)
         return $this->get('projects/'.urlencode($project_id).'/repository/tags');
     }
 
-    public function commits($project_id, $page = 1, $per_page = static::PER_PAGE)
+    public function commits($project_id, $page = 1, $per_page = self::PER_PAGE)
     {
         return $this->get('projects/'.urlencode($project_id).'/repository/commits', array(
             'page' => $page,