Added documentation for all variables not described yet.  Changed some variables used in color map selection.  Added variables:
Added documentation for all variables not described yet.  Changed some
variables used in color map selection.  Added variables:

 dev_minor	Minor device id (for variations on one type)
 dev_fill0	Set if driver can do solid area fills
 dev_fill1	Set if driver can do pattern area fills
 finc		Number to increment between member files
 fflen		Minimum field length to use in member file number

svn path=/trunk/; revision=724

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