- Annotation timestamps are now incremented until unique. This prevents
rapid, successive annotations colliding. The kind that occur during
unit tests and when using UI wrapper programs.
- Removed 'sleep' commands in unit tests that were added to circumvent
this. This speeds up the test suite somewhat.
- Fixed DOM lookup of special-case attributes: id and urgency are
not stored in the usual manner, and must be handled differently.
- Removed the responsibility of DOM to evaluate literals, because
they are handled more effectively in A3::tokenize.
- Fixed old code that assumed ".id" instead of "id".
- Removed unnecessary diag call from annotate.t.
