#37 add a shortenURL column to Gate
#37 add info about gate to admin page
Merge branch 'master' of https://github.com/DonutWorks/Ari into feat/issue-#37

Conflicts:
	app/views/admin/index.html.erb
	db/schema.rb
Merge pull request #41 from DonutWorks/feat/issue-#37

Feat/issue #37 추가한 Gate 정보 보기