History of the `rpanel' library
by Adrian W. Bowman & Ewan Crawford
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June      2006: version 1.0-1 released.
August    2006: version 1.0-3 released.
September 2006: version 1.0-4 released.
December  2008: version 1.0-5 released.
February  2013: version 1.1-1 released.
April     2013: version 1.1-2 released.
February  2014: version 1.1-3 released.
June      2015: version 1.1-4 released.