Substantial rewrite including reference to Linux binary debs and rpm's, the preferred consistent install location method, and a number of changes to the existing writing about the inconsistent install location option.
Substantial rewrite including reference to Linux binary debs and rpm's, the
preferred consistent install location method, and a number of changes to the
existing writing about the inconsistent install location option.

svn path=/trunk/; revision=5557

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