Work on expense report module

htdocs/core/actions_sendmails.inc.php

htdocs/core/lib/functions.lib.php

htdocs/core/modules/modExpenseReport.class.php

htdocs/expensereport/card.php

htdocs/expensereport/class/expensereport.class.php

htdocs/expensereport/class/expensereportstats.class.php

htdocs/expensereport/index.php

htdocs/expensereport/list.php

htdocs/expensereport/stats/index.php

htdocs/langs/en_US/trips.lang

htdocs/user/class/user.class.php