Better use of language files in views

Hi,

Actually, the module builder generates views with some hardcoded strings, with this commit not.

In case of use of a table, it generates entries in the lang array with this form :

$lang['$module_name_lower. '_field_'.set_value("view_field_name$counter")' = set_value("view_field_label$counter");

Hope this helps,

Regards