README.md in mongoid-report-0.1.6 vs README.md in mongoid-report-0.1.7

@@ -19,45 +19,45 @@
   end
 
   class Report1
     include Mongoid::Report
 
-    aggregation_field :field1, for: Model
+    column :field1, for: Model
   end
 
   class Report2
     include Mongoid::Report
 
     attach_to Model do
-      aggregation_field :field1
+      column :field1
     end
   end
 
   class Report3
     include Mongoid::Report
 
     group_by :day, for: Model
 
-    aggregation_field :field1, for: Model
+    column :field1, for: Model
   end
 
   class Report4
     include Mongoid::Report
 
     attach_to Model do
       group_by :day
 
-      aggregation_field :field1
+      column :field1
     end
   end
 
   class Report5
     include Mongoid::Report
 
     attach_to Model, as: 'summary-report' do
       group_by :day
 
-      aggregation_field :field1
+      column :field1
     end
   end
 ```
 
 ```ruby