Merge remote-tracking branch 'origin/master'

Author: hg-pyun

.github/PULL_REQUEST_TEMPLATE.md

@@ -11,3 +11,11 @@ https://github.com/reactjs/reactjs.org/blob/master/CONTRIBUTING.md
 If your PR references an existing issue, please add the issue number below
 
 -->
+
+**progress**  
+
+[ ] 번역 초안 작성
+[ ] glossary 용어 확인 (wiki or issue links)
+[ ] 띄어쓰기 검사 (http://speller.cs.pusan.ac.kr/)
+[ ] 리뷰 반영
+[ ] 최종 PR