added a reference to the constructor so I can override the default options...

added a reference to the constructor so I can override the default options when initializing multiselect with data-role attribute

js/bootstrap-multiselect.js

@@ -399,6 +399,8 @@
         });
     };
 	 
+	$.fn.multiselect.Constructor = Multiselect;	 
+	
 	$(function() {
 		$("select[data-role=multiselect]").multiselect();
 	});