Merge pull request #2079 from TheBenji/1.7.0

distinct option for count

lib/dao-factory.js

@@ -614,6 +614,12 @@ module.exports = (function() {
         [this.sequelize.fn('COUNT', col), 'count']
       ]
 
+      if(options.distinct) {
+        options.attributes = [
+            [this.sequelize.fn('COUNT', this.sequelize.fn('DISTINCT', col) ), 'count']
+        ]
+      }
+
       options.includeIgnoreAttributes = false
       options.limit = null