[ci skip] Add options.where to count and aggregate

lib/model.js

@@ -787,6 +787,7 @@ module.exports = (function() {
    * @param {String}          field The field to aggregate over. Can be a field name or *
    * @param {String}          aggregateFunction The function to use for aggregation, e.g. sum, max etc.
    * @param {Object}          [options] Query options. See sequelize.query for full options
+   * @param {Object}          [options.where] A hash of search attributes.
    * @param {DataType|String} [options.dataType] The type of the result. If `field` is a field in this Model, the default will be the type of that field, otherwise defaults to float.
    * @param {boolean}         [options.distinct] Applies DISTINCT to the field being aggregated over
    * @param {Transaction}     [options.transaction]
@@ -822,6 +823,7 @@ module.exports = (function() {
    * If you provide an `include` option, the number of matching associations will be counted instead.
    *
    * @param {Object}  [options]
+   * @param {Object}  [options.where] A hash of search attributes.
    * @param {Object}  [options.include] Include options. See `find` for details
    * @param {boolean} [options.distinct] Appliy COUNT(DISTINCT(col))
    *