ボタン改修
Merge branch 'master' of github.com:hafuka/coupon

Conflicts:
	src/main/webapp/WEB-INF/view/coupon/coupon.ftl
	src/main/webapp/WEB-INF/view/detail/detail.ftl
	src/main/webapp/WEB-INF/view/premium/premium.ftl
	src/main/webapp/WEB-INF/view/top.ftl