Sun, 10 Jan 2010 21:08:23 +0100 wenzelm refrain from poking blink rate -- might get stuck in invisible state;
Sun, 10 Jan 2010 20:38:23 +0100 wenzelm eliminated Command.stop, which tends to case duplicate traversal of commands;
Sun, 10 Jan 2010 20:14:21 +0100 wenzelm iterators for ranges of commands/starts -- avoid extra array per document;
Sun, 10 Jan 2010 17:10:32 +0100 wenzelm tuned document changes;
Sun, 10 Jan 2010 16:40:21 +0100 wenzelm misc tuning and clarification of Document/Change;
Sun, 10 Jan 2010 15:42:31 +0100 wenzelm adhoc reset of blink rate;
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