added admin/application controller.
admin/gate controller added. (#new, #create, #result)
link to new admin gate path
Merge branch 'master' of https://github.com/DonutWorks/Ari into fix/fine-grained-auth

Conflicts:
	app/controllers/gates_controller.rb
Merge branch 'fix/fine-grained-auth' of https://github.com/DonutWorks/Ari into fix/fine-grained-auth
Merge pull request #43 from DonutWorks/fix/fine-grained-auth

Fix/fine grained auth