Merge pull request #148 from ArcBees/jd_fix_multiple_resource

Support multiple resources
Update Chosen when an item selection is toggled from the list box
Merge pull request #149 from Chris-V/master

Update Chosen when an item selection is toggled from the list box
Update selected values when programatically set and isMultiple==true.
Merge pull request #150 from ArcBees/keep_multiple_selected_values_sync

Update selected values when programatically set on multi select.
Merge branch 'master' of juliengithub:jDramaix/gwtchosen into jd_fix_classes