include fix from http://tracker.phpbb.com/browse/PHPBB3-11688
Merge branch 'develop' of https://github.com/ziweizhou/phpbb3 into develop

# By Ziwei Zhou
# Via Ziwei Zhou
* 'develop' of https://github.com/ziweizhou/phpbb3:
  update phpbb/class_loader path
create menu style from prosilver theme
update footer and post panel color