-modify admin_comment
-modify board_detail
Modify for Merge
-Modify delete button --> comfirm()delete button,
-Modify url_for(index) --> url_for(board_list)
-Add css
-Modify css,
-Delete is_admin() --> Use authority
-Add board button img
Merge pull request #40 from KimMinJeong/KMJ

Kmj