fixed deep watch for options
fixed deep watch for options

semeano/ng-dropdown-multiselect,Aerochimps/acMultiselect,dotansimha/angularjs-dropdown-multiselect,dotansimha/angularjs-dropdown-multiselect,gertot/angularjs-dropdown-multiselect,semeano/ng-dropdown-multiselect,semeano/ng-dropdown-multiselect-pair,semeano/ng-dropdown-multiselect-pair,gertot/angularjs-dropdown-multiselect,jjwon0/angularjs-dropdown-multiselect,Aerochimps/acMultiselect,jjwon0/angularjs-dropdown-multiselect