`new_catalog` now accepts another argument, `--domain`, which is used to build the output file path, which now is of the form `<output_dir>/<locale>/<domain>.po`, the correct form. Removed the language and coutry arguments of `write_po`, which instead accepts a `babel.core.Locale` object to retrieve the needed object.

[general]
input_encoding = utf-8
strip_comments = yes
toc_backlinks = none

[html4css1 writer]
embed_stylesheet = no
stylesheet = style/edgewall.css
xml_declaration = no