+Fetch description from <META name="description" content="..."> and store it in
+bookmark.description if the description is empty. (How to update old
+descriptions without replacing my own comments?)
+
+Parse (or interpret) downloaded file and get javascript redirects.
+
+More and better documentation.
+
+Merge "writers" to storage managers.
+New storage managers: SQL (SQLite?).
+More robots (URL checkers): asyncore-based;
+robot(s) that test many URLs in parallel.
+