Refactor projects controller to use pundit
Add admin policy
Use admin policy class on admin
Create channels admin base controller
Create channel policy
Use channels base admin controller on channels admin controllers
Admins should be able to access channel's admin
Remove admin access from abitily
Use described_class on admin and channel policy spec
Remove admin controllers and specs close #77

This is part of #47
Remove admin views #47
Add neighborly-admin to gemfile
Remove admin routes and mount neighborly-admin
Remove admin policy
Remove admin JS close #79
Remove admin translations
Remove admin menu
Add channels admin menu
Add channels admin translactions
Change admin url