version 0.001; 2007-01-20

  * bugfix: functions should not modify their arguments (the functions
    such as rjdn_to_jdn() attempted to if given a zero day fraction)

  * use "day fraction" and "XYZDF" terminology in place of the less
    specific "time of day" and "TOD"

version 0.000; 2006-05-18

  * initial released version