Fix item_review show page
add edit and delete function for item_set
add email function when refuse answer the question
add dialog to show answer in item_question templates
add email.php.sample in config/development
clear the content before fill in data(in set create and edit page)
add a navi link for セット管理 in item/index page
Merge branch 'products_dev' of /home/yuyao/workspace/AOKI_EC into products_dev
Fix publish_flag problem in item_review
Merge remote-tracking branch 'origin/products_dev' into products_dev
Merge remote-tracking branch 'temp/products_dev' into products_dev

Conflicts:
	fuel/app/classes/model/item/review.php
	fuel/app/modules/management/classes/controller/item/review.php
	fuel/app/modules/management/templates/item/review/show.php