Merge pull request divio#113 from flycal6/patch-1

fixed slide centering issue

Author: FinalAngel

aldryn_bootstrap3/templates/aldryn_bootstrap3/plugins/carousel/standard/includes/image.html

@@ -1,5 +1,5 @@
 {% load cms_tags thumbnail %}
-<img
+<img class="center-block"
     {% with main_src=srcset.lg %}
         {% thumbnail image.file main_src.size crop=main_src.crop upscale=main_src.upscale subject_location=image.subject_location as main_thumb %}
         src="{{ main_thumb.url }}"