Implement bounding-box functionality for horizontal and vertical axes of custom labels following what is done in plbox.  The bounding-box results for custom labels look the same (good) as for more ordinary labels done with plbox in example 33.
Implement bounding-box functionality for horizontal and vertical axes
of custom labels following what is done in plbox.  The bounding-box
results for custom labels look the same (good) as for more ordinary
labels done with plbox in example 33.

ToDo: For plcolorbar still need to implement adjustment of overall
colorbar label position relative to plbox bounding box and implement
bounding-box functionality for (moved) overall colorbar label.


svn path=/trunk/; revision=11811

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