Add t/invlid.t
t/samples.t: check user.profile_image_url
Feed: Implement parse_url() and parse_uri(). Pass the test.
Feed: character decoding is now handled by XML::FeedPP
t/samples.t: add a sample where timestamp is missing. In that case, created_at is now explicitly undef because that is easier to test.
add xt/favicon.t.
Implementing use_favicon feature. still failing.