r20469@hades (orig r580): edenc | 2008-02-04 09:01:32 -0300

 added Field::File and Widget::Image
 r20470@hades (orig r581):  edenc | 2008-02-04 15:06:38 -0300
 making field_args rw for custom field set up
 r20471@hades (orig r582):  edenc | 2008-02-04 15:07:25 -0300
 added Field::mutable::File
 r20544@hades (orig r604):  edenc | 2008-02-11 15:59:58 -0300
 fixed field type methods for DateTime
 r20545@hades (orig r605):  edenc | 2008-02-11 16:00:44 -0300
 fixed demo app