* avandu.el (avandu-overview-excerpt): New face.
(avandu--insert-feed-title): Replace `newline' with `insert-char' to
prevent newlines from continuing indentation.
(avandu--insert-article-title): Replace `newline' with
`insert-char'.
(avandu--insert-article-excerpt): New function.
(avandu-list): Ask tt-rss to send along an excerpt of each article
and print this excerpt after the article's title.
