Implements iChain authentication

app/models/ability.rb

@@ -123,6 +123,7 @@ class Ability
     end
 
     can :index, :schedule # show?
+    can :show, User
   end
 
   def signed_in(user)
@@ -131,6 +132,9 @@ class Ability
     # Conference Registration
     can :manage, Registration, user_id: user.id
 
+    can :manage, User, id: user.id
+    can :show, User
+
     ## Proposals
     # Users can manage their own proposals
     can :manage, Event, id: user.events.pluck(:id)