seo udpated
version up
v1.5.2
 - 톡 자동 업데이트
 - 톡 로딩시 배경색 애니메이션 적용
 - jshint 처리
Revert "v1.5.2"

This reverts commit d5db5e23b78c00be6ede682db1d4eb380472ac6a.
Revert "Revert "v1.5.2""

This reverts commit 82a1f7548dae5332ec59028438d44970d7aeda7c.
v1.5.2X -> v1.5.3
Merge branch 'js_hotfix'

Conflicts:
	appengine/app.yaml