+04/13/97 Added ir-log-init command.
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+04/30/97 Added shared library support.
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+05/01/97 Added ir-log command.
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+08/28/97 Added support for Tk8.0/Tcl8.0.
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+05/20/98 Updated Explain record support.
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+06/10/98 Added ir-version command.
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+03/19/99 Added support for Tk8.1/Tcl8.1.