Move authorization info to the annotation directive.

This way the auth('delete') and auth('update) is calculated only once per annotation

h/js/app_directives.coffee

@@ -13,8 +13,21 @@ annotation = ['$filter', 'annotator', ($filter, annotator) ->
     scope.$watch 'model.$modelValue.id', (id) ->
       scope.thread = annotator.threading.idTable[id]
 
+      scope.auth = {}
+      scope.auth.delete =
+        if scope.model.$modelValue? and annotator.plugins?.Permissions?
+          annotator.plugins.Permissions.authorize 'delete', scope.model.$modelValue
+        else
+          true
+      scope.auth.update =
+        if scope.model.$modelValue? and annotator.plugins?.Permissions?
+          annotator.plugins.Permissions.authorize 'update', scope.model.$modelValue
+        else
+          true
+
     # Publish the controller
     scope.model = controller
+
   controller: 'AnnotationController'
   priority: 100  # Must run before ngModel
   require: '?ngModel'

h/js/controllers.coffee

@@ -696,12 +696,6 @@ class Annotation
         $scope.model.$modelValue.text = ''
         $scope.model.$modelValue.tags = ''
 
-    $scope.authorize = (action) ->
-      if $scope.model.$modelValue? and annotator.plugins?.Permissions?
-        annotator.plugins.Permissions.authorize action, $scope.model.$modelValue
-      else
-        true
-
     $scope.$on '$routeChangeStart', -> $scope.cancel() if $scope.editing
     $scope.$on '$routeUpdate', -> $scope.cancel() if $scope.editing