2.6 documentation/code incompatibilities, three more
sys.frame(sys.parent() fixes.

2.5 GPL, fixed segfault in frailty
	model with all coefficients NA, predict.coxph standard errors for
	type="terms", new name "survival", predict.coxph
	with newdata but no response <mgri@hal.stat.unipd.it>, bug in
	basehaz, fold in date package

2.4 fixed bug in coxpenal.fit (<m.carvalho@lancaster.ac.uk>) when a
    sparse frailty term is specified before a non-sparse one,
    added clogit(), added Mac makefile (Stefano Iacus), added "Maintainer"
    field, bug in plot.survfit <markc@nswcc.org.au>, better
    environment(formula) handling in coxph, a basehaz() function.

2.3 upstream bug fix for stratifed, penalised coxph

2.2 Fixed anova.survreg,anova.survreglist. Some doc fixes. legends for
    plot.survfit

2.1  options for `n' in print.survfit, [.Surv fixed for R1.1.1.

2.0   New code from Terry Therneau: faster cox regression, bug fixes.

1.1-6 plot.survfit(,fun="cloglog") broke with mark.times=TRUE when the first event was a censoring.
1.1-5 more documentation fixes, added data(stanford2), modified frailty()
   to avoid bug in new save()/load() code.	
1.1-4  documentation and data fixes, particularly survreg.distributions
