Work on accounting module

htdocs/accountancy/admin/account.php

htdocs/accountancy/admin/defaultaccounts.php

htdocs/accountancy/admin/index.php

htdocs/accountancy/customer/lines.php

htdocs/accountancy/index.php

htdocs/accountancy/journal/purchasesjournal.php

htdocs/accountancy/journal/sellsjournal.php

htdocs/accountancy/supplier/list.php

htdocs/core/menus/standard/eldy.lib.php

htdocs/langs/en_US/accountancy.lang

htdocs/langs/en_US/admin.lang

htdocs/langs/en_US/compta.lang

htdocs/langs/en_US/salaries.lang