Add isEmpty test for aui-hashmap
Adding aui-hashset module
Updating aui-collection tests to cover aui-hashset
Yogi loader regenerate
Use map.isEmpty() from set.isEmpty()
Source Formatting
Rename aui-hashmap to aui-map and aui-hashset to aui-set; The respective internal classes were also renamed to Y.Map and Y.Set.
Yogi loader regenerate
Rename .contains to .has to be closer to ECMAScript 6 Map/Dict implementation http://wiki.ecmascript.org/doku.php?id=harmony:simple_maps_and_sets