Added a leading slash to the paths of the binding/python directories.
Added a leading slash to the paths of the binding/python directories.

Also, added a note to avoid "some deb and rpm users scratch their heads and
wonder where this useless junk came from." (Thanks for the suggestion, Alan
:-)

svn path=/trunk/; revision=5345

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