Work Unit module finished.
~ app\controllers\Admin.java : new function added
~ app\dao\AbstractDao.java : new function added
~ app\model\WorkUnit.java : new method added
~ app\model\WorkUnitEmployeeMap.java : mapping information added
~ app\views\_workunitPartial.scala.html : template updated
~ conf\routes : route added
~ public\javascripts\r2s_admin.js : script change