Added typedef for new PLCursor struct and driver escape code for the get cursor operation (contributed by Paul Casteels).  Added prototypes for plmap() and plmeridians() (contributed by Wesley Ebisuzaki).
Added typedef for new PLCursor struct and driver escape code for the get
cursor operation (contributed by Paul Casteels).  Added prototypes for
plmap() and plmeridians() (contributed by Wesley Ebisuzaki).

svn path=/trunk/; revision=1214

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