Remove require_tree in admin.css.scss
show title, date, address field in events list view
Merge branch 'develop' of https://github.com/railsgirls-taiwan/rg-events into feature/8_show_events_list

Conflicts:
	app/assets/stylesheets/admin.css.scss
Add front stage's style
Add regist/unregist string to i18n
Add general attendees form
Add attendee regist view
Add navbar&front_container style to application.html.erb
Add event list & detail view
Add unregist manipulate
Merge branch 'feature/8_show_events_list' into develop