Changes for version 0.48

  • removed deprecated table/column metainfo methods - go via table_meta() instead
  • detect nullable columns in form_has_a() and don't make the column required if nullable
  • add a 'n/a' option in _field_options() if the field is nullable
  • altered use constant usage to work with Perl 5.6.1 (Barbie)
  • fixed diag message in 00-load.t (Barbie)