add speaker's info
jeado.ko 스피커 정보 업데이트
Merge branch 'master' of github.com:GDG-Korea/zeppelin

Conflicts:
	_data/speakers.yml
merge 나머지 파일..추가
speaker -  delete 'become a speaker' button
AngularJS 2.0 준비하세요 세션 내용 업데이트
안쓰는 google-map.html 삭제
스케쥴 목록 빈칸은 합쳐져서 보여주도록 변경.
세션, 스피커 모달 Language, Complexity 한글로 변경

Language는 개발언어로 사용새 변경
Merge branch 'master' of github.com:GDG-Korea/zeppelin
fix baseurl typo.
fix baseurl typo.
세션내용 스피피커 내용 업데이트.
Merge branch 'master' of github.com:GDG-Korea/zeppelin
세션 설명 팝업 수정

팝업 하단에 사용자 정보에 세션 타이틀 제거 및 사용자 영문이름 제거.
add speaker - wonjae lee.
Merge branch 'master' of github.com:GDG-Korea/zeppelin
지도 이미지 업데이
Merge branch 'master' of https://github.com/GDG-Korea/zeppelin
add webrtc session.