drawPalette(): prelim support for 'fullpage' arg

par(mar=c(3, 3, 1, 0)); d<-0.15;source('R/imagep.R');
layout(matrix(1:2,nrow=1),widths=c(1-d,d));plot(1:3,1:3);drawPalette(1:1
0,fullpage=TRUE,debug=3)