Tweaks for placement of exponential label to ensure it doesn't interfere with axes labels.
Tweaks for placement of exponential label to ensure it doesn't interfere
with axes labels.

svn path=/trunk/; revision=238

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