Main: rename config param "enable_timeline_web_notifications" -> "timeline_web_notifications". Now it's STRING param. This is more flexible.
timeline_list.tx: remove log messages for debug.
timeline_list.tx: now favicon notification is enabled in the timeline list view.
busybird.css, timeline.tx, timeline_list.tx: strip horizontal paddings in small displays. Fixes gh #1
Build.PL: minor metadata fix.
Documentation update.