Fixed image delete permission issue

Also fixed missing translations and wrote tests to cover issue.
Fixes #258

@@ -405,7 +405,7 @@ class PermissionService
         $action = end($explodedPermission);
         $this->currentAction = $action;
 
-        $nonJointPermissions = ['restrictions'];
+        $nonJointPermissions = ['restrictions', 'image', 'attachment'];
 
         // Handle non entity specific jointPermissions
         if (in_array($explodedPermission[0], $nonJointPermissions)) {
@@ -421,7 +421,6 @@ class PermissionService
             $this->currentAction = $permission;
         }
 
-
         $q = $this->entityRestrictionQuery($baseQuery)->count() > 0;
         $this->clean();
         return $q;

@@ -60,3 +60,13 @@ $factory->define(BookStack\Tag::class, function ($faker) {
         'value' => $faker->sentence(3)
     ];
 });
+
+$factory->define(BookStack\Image::class, function ($faker) {
+    return [
+        'name' => $faker->slug . '.jpg',
+        'url' => $faker->url,
+        'path' => $faker->url,
+        'type' => 'gallery',
+        'uploaded_to' => 0
+    ];
+});
\ No newline at end of file

@@ -89,6 +89,7 @@ return [
      * Chapters
      */
     'chapter' => 'Chapter',
+    'chapters' => 'Chapters',
     'chapters_popular' => 'Popular Chapters',
     'chapters_new' => 'New Chapter',
     'chapters_create' => 'Create New Chapter',

@@ -578,4 +578,45 @@ class RolesTest extends TestCase
             ->see('Cannot be deleted');
     }
 
+
+
+    public function test_image_delete_own_permission()
+    {
+        $this->giveUserPermissions($this->user, ['image-update-all']);
+//        $admin = $this->getAdmin();
+        $page = \BookStack\Page::first();
+        $image = factory(\BookStack\Image::class)->create(['uploaded_to' => $page->id, 'created_by' => $this->user->id, 'updated_by' => $this->user->id]);
+
+        $this->actingAs($this->user)->json('delete', '/images/' . $image->id)
+            ->seeStatusCode(403);
+
+        $this->giveUserPermissions($this->user, ['image-delete-own']);
+
+        $this->actingAs($this->user)->json('delete', '/images/' . $image->id)
+            ->seeStatusCode(200)
+            ->dontSeeInDatabase('images', ['id' => $image->id]);
+    }
+
+    public function test_image_delete_all_permission()
+    {
+        $this->giveUserPermissions($this->user, ['image-update-all']);
+        $admin = $this->getAdmin();
+        $page = \BookStack\Page::first();
+        $image = factory(\BookStack\Image::class)->create(['uploaded_to' => $page->id, 'created_by' => $admin->id, 'updated_by' => $admin->id]);
+
+        $this->actingAs($this->user)->json('delete', '/images/' . $image->id)
+            ->seeStatusCode(403);
+
+        $this->giveUserPermissions($this->user, ['image-delete-own']);
+
+        $this->actingAs($this->user)->json('delete', '/images/' . $image->id)
+            ->seeStatusCode(403);
+
+        $this->giveUserPermissions($this->user, ['image-delete-all']);
+
+        $this->actingAs($this->user)->json('delete', '/images/' . $image->id)
+            ->seeStatusCode(200)
+            ->dontSeeInDatabase('images', ['id' => $image->id]);
+    }
+
 }