Added many new variables used in driver interface to PLStream definition. Eliminated some obsolete variables and function prototypes.
Added many new variables used in driver interface to PLStream definition.
Eliminated some obsolete variables and function prototypes.

svn path=/trunk/; revision=294

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