src/*.{h,c} single -> double
man/*.Rd  convert *.d by Sd2Rd


R/labels.rpart.s	replace call to prlabel by S code.
R/model.frame.rpart.s 	deparse calls
R/na.rpart.s		as x has no attributes in R, redesign
R/plot.rpart.s 		change frame=0 to .GlobalEnv
R/post.rpart.s		change `title' trickery
R/print.rpart.s		remove nsmall in call to format
			attr(x, 'levels') not 'level'
R/rpart.class.s		remove exclude=NA in call to table
R/rpart.matrix.s	a data.frame is not a list, so redesign
R/rpart.s		single -> double
			sys.parent() -> sys.frame(sys.parent())
R/rpartco.s		remove frame=0 several times
R/snip.rpart.s		add a drop=F on x$csplit
R/summary.rpart.s	remove justify="left" in format
			remove comma in paste(... ,,collapse ...)
R/text.rpart.s		text.default prints "NA", so remove these
			no par("cxy") so work around
			remove density=0 in calls to polygon
R/xpred.rpart.s		single -> double
			sys.parent() -> sys.frame(sys.parent())
R/zzz.R			a few missing functions. Make labels() generic.

src/Makefile		simple Makefile.

At present post.rpart does not work very well as text has problems
with multi-line text.
