Parse area when method unknown

[wvengen]

The text

Alaska pollakfilet, uit de Stille Oceaan

Has a fish name and an area, but it is unknown whether it is wild or aquaculture. It would be nice to still recognize this. This requires a change in the data structure (which the flat parser sometimes already does), to something like:

[
  {
    :names =>   [{ :common=>"Alaska pollakfilet", :latin=>nil }],
    :areas =>   [{ :text=>"de Stille Oceaan", :fao_codes=>[]}],
    :methods => [],
    :kind =>    nil,
  },
]