리스트뷰를 위한 views.py 구현 및 urls.py 수정
views.py 수정
settings.py 수정
Merge branch 'dev/board' of github.com:sparcs-kaist/zabo into feat/view
urls.py 수정
views.py 수정. 포스터 받아올 때 id 순으로 정렬
Merge branch 'dev/board' into develop

Conflicts:
	zabo/urls.py
README, requirements 수정
README, requirements 수정
settings.py의 IMAGEFIT_ROOT 수정
Merge branch 'develop' into dev/board
edit views.py
Merge branch 'dev/board' of github.com:sparcs-kaist/zabo into feat/view
edit templates due to model changes
change board url
created layout page
erased search form outline
make main page to extend layout
make redirection '/' to '/main/'
created dropdown category menu