adds rails_admin
adds cancan
adds role attribute to users
adds authorization to rails_admin
adds ConferenceRole model
adds is_admin_of and is_user_of conference to user model
removes CanCanCan gem adds Pundit gem
adds ConferencePolicy
adds selectize plugin
adds conference roles page with selectize implemented
adds conference role management.
adds base service
fixes rails_admin authorization error
Merge pull request #44 from kodgemisi/confdeck-3

Confdeck 3