Implement leap-second option for btimeqsas.  Details for last second before discontinuity need more effort to give broken-down time with (int) sec = 60 to flag such epochs where an extra amount of time is being inserted.
Implement leap-second option for btimeqsas.  Details for last second before
discontinuity need more effort to give broken-down time with (int) sec = 60
to flag such epochs where an extra amount of time is being inserted.

svn path=/trunk/; revision=9647

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot